need help with those please! and this is a operating income not a operating loss!

Required information [The following information applies to the questions displayed below.] Marathon Company makes and sells a single product. The current selling price is $19 per unit. Variable expenses are $11.4 per unit, and fixed expenses total $60,240 per month. (Unless otherwise stated, consider each requirement separately.) Management is considering a change in the sales force compensation plan. Currently each of the firm's two salespeople is paid a salary of $2,500 per month. 9. 1. Calculate the monthly operating income (or loss) that would result from changing the compensation plan to a salary of $400 pemonth, plus a commission of $0.8 per unit, assuming a sales volume of 7,400 units per month. 2. Calculate the monthly operating income (or loss) that would result from changing the compensation plan to a salary of $400 per month, plus a commission of $0.8 per unit, assuming a sales volume of 7,200 units per month. h. 1. Assuming that the sales volume of 7,200 units per month achieved in part g could also be achieved by increasing advertising by $1,000 per month instead of changing the sales force compensation plan. What would be the operating income or loss? 2. Which strategy would you recommend? (2) Answer is not complete. Complete this question by entering your answers in the tabs below. 9-1. Calculate the monthly operating income (or loss) that would result from changing the compensation plan to a salary of $400 per month, plus a commission of $0.8 per unit, assuming a sales volume of 7,400 units per month. Complete this question by entering your answers in the tabs below. g-1. Calculate the monthly operating income (or loss) that would result from changing the compensation plan to a salary of $400 per month, plus a commission of $0.8 per unit, assuming a sales volume of 7,400 units per month. Note: Do not round intermediate calculations. g-2. Calculate the monthly operating income (or loss) that would result from changing the compensation plan to a salary of $400 per month, plus a commission of $0.8 per unit, assuming a sales volume of 7,200 units per month. Note: Do not round intermediate calculations. Losses should be indicated by a minus sign. h1. Assuming that the sales volume of 7,200 units per month achieved in part g could also be achieved by increasing advertising by $1,000 per month instead of changing the sales force compensation plan. What would be the operating income or loss? Note: Do not round intermediate calculations. Losses should be indicated by a minus sign