If the contribution margin ratio is 25%, and total revenue is $85,000, what is the contribution margin in dollars? Select one: a. $21,250. b. $212,500 O c. $2,125. d. $63,750. The relevant range refers to: Select one: a. a particular range of production where cost behavior remains the same. O b. a particular range of production wherein fixed costs remain constant, O c. a particular range of production where total contribution margin remains the same. d. a particular range of production where no mixed costs are incurred. The relevant range refers to: Select one: a, a particular range of production where cost behavior remains the same. b. a particular range of production wherein fixed costs remain constant. c. a particular range of production where total contribution margin remains the same. d. a particular range of production where no mixed costs are incurred