ex 1.3

pcost.py

@@ -0,0 +1,17 @@
+from decimal import Decimal
+
+
+def run(filename: str) -> Decimal:
+    with open(filename, 'r') as lines:
+        total = Decimal(0.0)
+        _, count, price = lines.readline().split()
+        count = Decimal(count)
+        price = Decimal(price)
+        total += count * price
+    return total
+
+
+if __name__ == '__main__':
+    filename = 'Data/portfolio.dat'
+    value = run(filename)
+    print(f"value = {value}")