You purchase a shirt for $25.00. you have a coupon for 20% off. sales tax is 7.5%. a) what’s the amount of the of the discount on the shirt? show your work. b) what is the sales price of the shirt? show your work. c) what is the tax on the shirt after the discount? show your work. d) what is the final price of the shirt? show your work. i know it’s a 4 parter but someone me ! : )