Shilshoe Company's sales compensation ranged from $12,000$16,000 per month and sold units ranging from 1,6002,400. Using High-low method calculate the following (only include numbers in your answer, do not include \$ or,): 1) Monthly base salary: 2) Commission rate per unit sold: 3) How many units did Shilshoe sell in a year if Shilshoe's total compensation for the year was $158,000