On a recent shopping trip, arnold started with $150. he spent these amounts at various stores $49.81, $32.43, $25.90, $14.58, $23.33. how much remained of $150 when he was finished? estimate by rounding amounts to the nearest dollar then computing

Ben frank is an electrician who installs lighting fixtures. he charges (in dollars) his clients 15h+40f15h+40f where hh is the number of hours worked and ff is the number of fixtures installed. how much does ben frank charge when he works 77 hours and installs 99 fixtures?