3 hours = 3 x 60 = 180 minutes 30 minutes practice piano 35 minutes on phone total = 180 + 30 + 35 = 245 minutes ------------------------ $0.18 x 3663 = $659.34 each person 4 persons = 4 x $659.34 = $2637.36
$100 - spent half at video game store = $100/2 =$50 he spent half of the half left at music store = $50/2 =$25 total spent at video and music stores = $50 + $ 25 = $75
----------------------------- $0.53 x 4800 = $2544