Shipping Calculator

$$ Create a C$++$ program that calculates the total cost of an order including shipping.

$$ Use the following table to calculate shipping cost:

COST OF ITEMS SHIPPING COST

$===========================$

$<50\mathrm{.}008\mathrm{.}95$

$50\mathrm{.}00-99\mathrm{.}9911\mathrm{.}95$

$100\mathrm{.}00-199\mathrm{.}9913\mathrm{.}95$

$>=200\mathrm{.}00$ FREE

After entering the cost of items, your program validates the user input $($the cost value$)$ so only values that are greater than $0$ should be accepted and processed; otherwise, no processing can occur and the program displays an error message for the user and exits. Hint: use this if statement after the input statement:

if cost$\_$of$\_$items $>0$: