A Suit Coat That Is Marked Down 35% Has A Sale Price Of $292.50 Use The Sale Price Formula To Find The Regular Price Of The Suit Coat?

We presume the formula you want to use is the one found here.
R = S/(1-r)
  = 292.50/(1-0.35)
  = 292.50/0.65
  = 450

The regular price of the suit coat is $450.00.