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Melissa bought some cookies and sweets with 3 $50 notes and received a change of $49.

The cost of each sweet is $2.

The cost of each cookie is $1.

Melissa bought 16 more sweets than cookies.

(a) How much do the cookies cost in total?

(b) How much do the sweets cost in total?

Notes to student:

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