question 134 Built-ins & Sorting · easy

Order total with free shipping

Checkout adds a flat shipping charge, but orders whose goods total 50 or more ship free. Compute what the customer pays.

Functionorder_total(lines, shipping)

linesdictionaries with qty and price

Returnsthe goods total (quantity × price, added up) plus shipping, or just the goods total when it is 50 or more

Rulesan empty basket costs only the shipping

Examples

callorder_total([{'qty': 2, 'price': 7.5}, {'qty': 1, 'price': 31}], 4.99)returns50.99

callorder_total([{'qty': 1, 'price': 171.25}], 4.99)returns171.25

callorder_total([], 4.99)returns4.99