Exercise 22-5 fallon company uses flexible budgets to control its selling expenses. monthly sales are expected to range from $166,900 to $198,400. variable costs and their percentage relationship to sales are sales commissions 6%, advertising 5%, traveling 4%, and delivery 2%. fixed selling expenses will consist of sales salaries $35,300, depreciation on delivery equipment $6,600, and insurance on delivery equipment $1,000. prepare a monthly flexible budget for each $10,500 increment of sales within the relevant range for the year ending december 31, 2017. (list variable costs before fixed costs.)