Answer:Let's break this down step by step.Price of one shirt: 450450Discount on one shirt: 7575Price after discount:450−75=375450−75=375Total cost for four shirts:4×375=15004×375=1500Expression to represent the situation:Total Cost=4×(450−75)Total Cost=4×(450−75)Price paid by each: Since Rose and Floor share the total cost, we divide the total cost by 2:Price paid by each=15002=750Price paid by each= 21500 =750Summary:Numerical expression: 4×(450−75)4×(450−75)Price paid by each: 750