Walden’s family is shopping for a reclining chair. The chair the family decided on has a retail price of $800 plus 5% sales tax at four stores. Each store is offering a different promotion.
 Store
 Promotional Offer
 A
 $75 instant rebate
 B
 10% off sale
 C
 5% off sale plus store pays sales tax
 D
 a “no tax” sale—the store pays the tax
 Which store has the best deal?