David bought 32 packets of chocolates at a price of $10 per packet.

He gave away 240 chocolates to the children in an orphanage and sold the rest of the chocolates at $1.50 each.

If he collected $600 from the sale of the chocolates, find

(a) the number of chocolates in each packet.

(b) the profit made from the sale of the chocolates.

Notes to students:

1. If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12