You are working on a eCommerce website and need to make a shipping cost calculator based on the order amount. The store uses the following cost structure: For orders in the US:
- $75+ orders have free shipping
- orders less than $75 have a shipping fee of 10% of the total order amount.
For international orders, there is a 15% shipping fee, with a maximum of $50. This means that the maximum shipping fee for an international order is $50.
You need to complete the given shippingCost() function, which takes the order amount and a Boolean indicating whether the order is international or not, and returns the shipping cost for that order. The return amount should be a Double.
Sample Input: 140.0 true
Sample Output: 21.0 The order is for $140 and is international. So, the shipping cost would be 15%, which is $21.