well if the pizza costs $12.00 then that leaves $2.25
$14.25-$12.00=$2.25
and then take $2.25 and devide it by 5 for the amout each soda costs
$2.25/5=$0.45
each soda costs $0.45
Assuming that this figure is a rectangular prism the answer would be 45.58 units cubed
I think this is how you do it. Hope this helps!!