During a year, Mark's monthly sales compensation ranged between $18,000 and $24,000 per month and unit sold ranged between 2,000 and 3,000 units for those same months.

Use the high-low method to determine Mark's monthly salary and commission rate per unit sold.

What is the Mark's monthly salary?

What is the Mark's commission rate per unit sold?

Using your answers from the last two questions, calculate the total number of units sold in a year when Mark's total compensation amounted to $168,000.