diff --git a/Plugin/Backend/Block/Widget/Grid/Massaction/Extended.php b/Plugin/Backend/Block/Widget/Grid/Massaction/Extended.php
new file mode 100644
index 0000000..63a98d2
--- /dev/null
+++ b/Plugin/Backend/Block/Widget/Grid/Massaction/Extended.php
@@ -0,0 +1,23 @@
+<?php
+namespace PPCs\Core\Plugin\Backend\Block\Widget\Grid\Massaction;
+use Magento\Backend\Block\Widget\Grid\Massaction\Extended as Sb;
+// 2019-10-22
+final class Extended {
+	/**
+	 * 2019-10-22
+	 * "Make the «Cost» and «Price» columns of the the Iksanika's Stock Inventory Manager's grid editable":
+	 * https://github.com/p-pcs/core/issues/17
+	 * @see \Iksanika\Stockmanage\Block\Adminhtml\Product\Grid::_prepareMassaction()
+	 * @see \Magento\Backend\Block\Widget\Grid\Massaction\Extended::addItem()
+	 * @param Sb $sb
+	 * @param string $id
+	 * @param array(string => mixed) $a
+	 * @return array(string, array(string => mixed))
+	 */
+	function beforeAddItem(Sb $sb, $id, array $a) {
+		if ('save' === $id && df_contains(dfa($a, 'url'), 'stockmanage/product/massUpdateProducts')) {
+			$a['fields'] = array_merge($a['fields'], ['cost', 'price']);
+		}
+		return [$id, $a];
+	}
+}
\ No newline at end of file
diff --git a/Plugin/Iksanika/Stockmanage/Block/Adminhtml/Product/Grid.php b/Plugin/Iksanika/Stockmanage/Block/Adminhtml/Product/Grid.php
index 73cf132..e63d35b 100644
--- a/Plugin/Iksanika/Stockmanage/Block/Adminhtml/Product/Grid.php
+++ b/Plugin/Iksanika/Stockmanage/Block/Adminhtml/Product/Grid.php
@@ -1,6 +1,7 @@
 <?php
 namespace PPCs\Core\Plugin\Iksanika\Stockmanage\Block\Adminhtml\Product;
 use Iksanika\Stockmanage\Block\Adminhtml\Product\Grid as Sb;
+use Iksanika\Stockmanage\Block\Widget\Grid\Column\Renderer\Number;
 use Magento\Framework\Event\Observer as Ob;
 // 2019-10-22
 final class Grid {
@@ -22,7 +23,16 @@ final class Grid {
 	function aroundAddColumn(Sb $sb, \Closure $f, $id, $data) {
 		if (!in_array($id, ['visibility', 'websites'])) {
 			if ('price' === $id) {
-				$f('cost', [
+				/**
+				 * 2019-10-22
+				 * "Make the «Cost» and «Price» columns
+				 * of the the Iksanika's Stock Inventory Manager's grid editable":
+				 * https://github.com/p-pcs/core/issues/17
+				 */
+				/** @var array(string => string) $pd */
+				$pd = ['class' => 'input-text admin__control-text', 'renderer' => Number::class];
+				$data = $pd + $data;
+				$f('cost', $pd + [
 					'column_css_class' => 'col-price'
 					,'currency_code' => df_currency_base_c(df_request('store', 0))
 					,'header' => 'Cost'
diff --git a/Plugin/Iksanika/Stockmanage/Controller/Adminhtml/Product/MassUpdateProducts.php b/Plugin/Iksanika/Stockmanage/Controller/Adminhtml/Product/MassUpdateProducts.php
new file mode 100644
index 0000000..424adaf
--- /dev/null
+++ b/Plugin/Iksanika/Stockmanage/Controller/Adminhtml/Product/MassUpdateProducts.php
@@ -0,0 +1,21 @@
+<?php
+namespace PPCs\Core\Plugin\Iksanika\Stockmanage\Controller\Adminhtml\Product;
+use Magento\Catalog\Model\Product as P;
+// 2019-10-22
+final class MassUpdateProducts {
+	/**
+	 * 2019-10-22
+	 * "Make the «Cost» and «Price» columns of the the Iksanika's Stock Inventory Manager's grid editable":
+	 * https://github.com/p-pcs/core/issues/17
+	 * @see \Iksanika\Stockmanage\Controller\Adminhtml\Product\MassUpdateProducts::execute()
+	 */
+	function beforeExecute() {
+        $cost = df_float(df_request('cost')); /** @var float[] $cost */
+        $price = df_float(df_request('price')); /** @var float[] $price */
+        $storeId = (int)df_request('store'); /** @var int $storeId */
+        foreach (df_int(df_request('product', [])) as $i => $id) { /** @var int $i */ /** @var int $id */
+			$p = df_product_r()->getById($id, true, $storeId); /** @var P $p */
+			$p->addData(['cost' => $cost[$i], 'price' => $price[$i]])->save();
+		}
+	}
+}
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 609e1ee..500c2be 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
 	"name": "p-pcs/core"
-	,"version": "0.1.1"
+	,"version": "0.1.2"
 	,"description": "A custom module for performance-pcs.com (Magento 2)"
 	,"type": "magento2-module"
 	,"homepage": "https://github.com/p-pcs/core"
diff --git a/etc/adminhtml/di.xml b/etc/adminhtml/di.xml
index e83149c..1d8fd8e 100644
--- a/etc/adminhtml/di.xml
+++ b/etc/adminhtml/di.xml
@@ -9,11 +9,31 @@ https://github.com/p-pcs/core/issues/12
 2) "Remove the «Visibility» column from the Iksanika's Stock Inventory Manager's grid":
 https://github.com/p-pcs/core/issues/13
 3) "Remove the «Type» column from the Iksanika's Stock Inventory Manager's grid":
-https://github.com/p-pcs/core/issues/14 -->
+https://github.com/p-pcs/core/issues/14
+4) "Make the «Cost» and «Price» columns of the the Iksanika's Stock Inventory Manager's grid editable":
+https://github.com/p-pcs/core/issues/17 -->
 	<type name='Iksanika\Stockmanage\Block\Adminhtml\Product\Grid'>
 		<plugin
 			name='PPCs\Core\Plugin\Iksanika\Stockmanage\Block\Adminhtml\Product\Grid'
 			type='PPCs\Core\Plugin\Iksanika\Stockmanage\Block\Adminhtml\Product\Grid'
 		/>
 	</type>
+<!-- 2019-10-22
+"Make the «Cost» and «Price» columns of the the Iksanika's Stock Inventory Manager's grid editable":
+https://github.com/p-pcs/core/issues/17 -->
+	<type name='Iksanika\Stockmanage\Controller\Adminhtml\Product\MassUpdateProducts'>
+		<plugin
+			name='PPCs\Core\Plugin\Iksanika\Stockmanage\Controller\Adminhtml\Product\MassUpdateProducts'
+			type='PPCs\Core\Plugin\Iksanika\Stockmanage\Controller\Adminhtml\Product\MassUpdateProducts'
+		/>
+	</type>
+<!-- 2019-10-22
+"Make the «Cost» and «Price» columns of the the Iksanika's Stock Inventory Manager's grid editable":
+https://github.com/p-pcs/core/issues/17 -->
+	<type name='Magento\Backend\Block\Widget\Grid\Massaction\Extended'>
+		<plugin
+			name='PPCs\Core\Plugin\Backend\Block\Widget\Grid\Massaction\Extended'
+			type='PPCs\Core\Plugin\Backend\Block\Widget\Grid\Massaction\Extended'
+		/>
+	</type>
 </config>
\ No newline at end of file