solution

app/car.py

@@ -0,0 +1,11 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class Car:
+    brand: str
+    fuel_consumption: float
+
+    def calculate_trip_cost(self, distance: float, fuel_price: float) -> float:
+        fuel_needed = (distance / 100) * self.fuel_consumption
+        return round(fuel_needed * fuel_price, 2)

app/config.py

@@ -0,0 +1,6 @@
+import json
+
+
+def load_config(filename: str) -> dict:
+    with open(f"app/{filename}", "r") as file:
+        return json.load(file)

app/customer.py

@@ -0,0 +1,41 @@
+from dataclasses import dataclass
+from typing import List, Dict
+from app.car import Car
+from app.shop import Shop
+
+
+@dataclass
+class Customer:
+    name: str
+    product_cart: Dict[str, int]
+    home_location: List[float]
+    current_location: List[float]
+    money: float
+    car: Car
+
+    def calculate_trip_cost(self, shop: Shop, fuel_price: float) -> float:
+        distance = shop.calculate_distance(self.current_location)
+        return self.car.calculate_trip_cost(distance * 2, fuel_price)
+
+    def calculate_products_price(self, shop: Shop) -> float | int:
+        return sum(shop.get_product_price(product)
+                   * quantity for product, quantity
+                   in self.product_cart.items())
+
+    def get_full_price(self, shop: Shop, fuel_price: float) -> float:
+        trip_cost = self.calculate_trip_cost(shop, fuel_price)
+        products_cost = self.calculate_products_price(shop)
+        return trip_cost + products_cost
+
+    def can_afford_trip(self, shop: Shop, fuel_price: float) -> bool:
+        return self.money >= self.get_full_price(shop, fuel_price)
+
+    def make_purchase(self, shop: Shop, fuel_price: float) -> bool:
+        if self.can_afford_trip(shop, fuel_price):
+            self.money -= self.get_full_price(shop, fuel_price)
+            self.current_location = shop.location
+            return True
+        return False
+
+    def go_back(self) -> None:
+        self.current_location = self.home_location

app/main.py

@@ -1,3 +1,65 @@
-def shop_trip():
-    # write your code here
-    pass
+from app.config import load_config
+from app.car import Car
+from app.shop import Shop
+from app.customer import Customer
+from datetime import datetime
+
+
+def shop_trip() -> None:
+    config = load_config("config.json")
+    fuel_price = config["FUEL_PRICE"]
+    shops = [Shop(**shop) for shop
+             in config["shops"]]
+    customers = [Customer(customer["name"],
+                          customer["product_cart"],
+                          customer["location"],
+                          customer["location"],
+                          customer["money"],
+                          Car(customer["car"]["brand"],
+                              customer["car"]["fuel_consumption"]))
+                 for customer in config["customers"]]
+    for customer in customers:
+        min_price = float("inf")
+        best_shop = ""
+        print(f"{customer.name} has {customer.money} dollars")
+        for shop in shops:
+            price = customer.get_full_price(shop, fuel_price)
+            print(f"{customer.name}'s trip to the {shop.name} costs {price}")
+
+            if price < min_price:
+                min_price = price
+                best_shop = shop
+
+        if not customer.can_afford_trip(best_shop, fuel_price):
+            print(f"{customer.name} doesn't have enough money "
+                  f"to make a purchase in any shop")
+            continue
+
+        print(f"{customer.name} rides to {best_shop.name}\n")
+        customer.make_purchase(best_shop, fuel_price)
+        date = (datetime(
+            2021, 4, 1, 12, 33, 41
+        ).strftime("%m/%d/%Y %H:%M:%S"))
+        print(
+            f"Date: {date}\n"
+            f"Thanks, {customer.name}, for your purchase!\n"
+            f"You have bought:"
+        )
+
+        total_price = 0
+        for product_name, product_count in customer.product_cart.items():
+            product_account_price = (
+                product_count * best_shop.get_product_price(product_name)
+            )
+            total_price += product_account_price
+            print(f"{product_count} {product_name}s "
+                  f"for{product_account_price: .2f}".rstrip("0").rstrip(".")
+                  + " dollars")
+
+        print(f"Total cost is {total_price} dollars\nSee you again!\n")
+        customer.go_back()
+        print(f"{customer.name} rides home\n"
+              f"{customer.name} now has {customer.money} dollars\n")
+
+
+shop_trip()

app/shop.py

@@ -0,0 +1,16 @@
+from dataclasses import dataclass
+from typing import List, Dict
+from math import dist
+
+
+@dataclass
+class Shop:
+    name: str
+    location: List[float]
+    products: Dict[str, float]
+
+    def calculate_distance(self, customer_location: List[float]) -> float:
+        return dist(self.location, customer_location)
+
+    def get_product_price(self, product: str) -> float | int:
+        return self.products.get(product)