Answer:
Step-by-step explanation:
Selling price for the shop = 63 + 21 = $84
As given,
Selling price for the shop = 150% of cost price of the shop
∴ 84 = 1.5 * Cost price
∴ Cost price = $56
Profit earned by bike shop = Selling Price - Cost price = 84 - 56 = $28