Betty donahue is choosing between two fitness centers. center a charges $375 per year for unlimited use of all facilities. center b charges a $35 sign up fee, a $12 monthly fee, and $5 per aerobics class. if betty goes to aerobics once a week, which club is least expensive for her to use for a year

Center A : 375 per yr

Center B : 35 + 12(12) + 5(52) = 35 + 144 + 260 = 439 per yr
I multiplied 12 * 12 because it was $ 12 a month and there are 12 months in a yr. I multiplied 5 * 52 because each aerobic class is $ 5 per class, and she went once per week, and there are 52 weeks in a yr.

so the cheaper one is Center A