Alexis buys groceries using her credit card. Her card has an APR of 19.99% and she must pay at least 5% of the balance at the end of each month. If her carry-over balance for groceries is $374.47, what would her finance charge be at the end of the month?

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?