Im wanting to make a GUI where Im selling shirts and pants. Pants cost 20 shirts 15, and have to be atleast 18 to make a order. also want to have a tax rate a certain % for CA and NY and base % for all other states. Shipping is a certain $ for alaska and certain $ for Hawaii and same for all other states. The info ill need customer to enter is Full name, address including zip and state, email address, birth year, number of shirts and number of pants. so the output would be cost, tax, shipping, and total cost.
Any help would be awesome!