Translate to an Algebraic Expression $\$ 39.50$ For a Book $\$ 39.50-y$

Multiple Choice

Translate to an algebraic expression.
-Alex had y dollars before spending $\$ 39.50$ for a book. How much did he have after the purchase?

A) $\$ 39.50-y$
B) y $-\$ 39.50$
C) $\$ 39.50+y$
D) $\$ 39.50 \mathrm{y}$