GIVEN A) Luis wants to buy a skateboard that usually sells for $79.76. All merchandise is discounted by 12%. What is the total cost of the skateboard if Luis has to pay a state sales tax of 7.75%. Round your intermediate calculations and answer to the nearest cent.
B) Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. She also earns a base salary of $675 per week. How much did she earn last week if she sold $4,800 in electronics merchandise? Round your intermediate calculations and answer to the nearest cent.