High-Low Method

Impeccable Puppy Training, Inc. provides classes that are popular with dog owners. The number of classes offered over five months, along with the total costs of offering these classes, follows:

Classes Offered Costs Incurred

April 10 $9,500

May 8 $9,000

June 20 $18,000

July 13 $12,000

August 18 $17,500

1. Using the high-low method, determine AND state the cost formula (3 points):

2. Using the cost formula, determine the total cost of offering 25 puppy training classes in September (3 points):