Choose the method of pay that would result in the most earnings for one month on sales of $73,620. a. straight commission of 6% on all sales b. monthly salary of $3,000 plus 2% commission on all sales c. graduated commission of 4% on the first $50,000 in sales and 9% on anything over that d. graduated commission of 5% on the first $35,000 in sales and 7% on anything over that

For option A: Earning = 0.06 x $73,620 = $4,417.20
For option B: Earning = $3,000 + 0.02 x $73,620 = $3,000 + $1,472.40 = $4,472.40
For option C: Earning = 0.04 x $50,000 + 0.09 x ($73,620 - $50,000) = $2,000 + 0.09 x $23,620 = $2,000 + $2,125.80 = $4,125.80
For option D: Earning = 0.05 x $35,000 + 0.07 x $(73,620 - 35,000) = $1,750 + 0.07 x $38,620 = $1,750 + $2,703.4 = $4,453.40

Therefore, the method that yeilds the most earning is monthly salary of $3,000 plus 2% commission on all sales .