I have no clue how to answer this question

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?