Zeina owns a hairdressing salon. She buys a pack of 60 bottles of shampoo from a warehouse for $240.
She plans to sell the bottles of shampoo to her customers for $5.50 each.
a) Calculate the percentage profit Zeina makes on each bottle she sells for $5.50.

Answer (a) [2]
b) Zeina sells 45 bottles at the full price then sells the rest with a 20%
discount. Calculate the total profit she makes selling all 60 bottles.