Can you please help me

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

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