Plz help p

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

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b