Answer:
Cost of shampoo = $4.50
% Mark up of Shampoo = 15%
15% Mark up of Shampoo = 15/100 x $4.50 = $0.67
Price of Shampoo 15% Mark up = $4.50 + $0.67 = $5.17
% Mark down of Shampoo = 4%
4% Mark down of shampoo = 4/100 x $5.17 = $0.21
Price of Shampoo 4% Mark down = $5.17 - $0.21 = $4.96
Step-by-step explanation: