NEED-TO-KNOW 20-3 A manufacturing company budgets sales of $70,000 during July. It pays sales commissions of 5% of sales and also pays a sales manager a salary of $3,000 per month. Other monthly costs include depreciation on office equipment ($500), insurance expense ($200), advertising ($1,000), and office manager salary of $2,500 per month. For the month of July, compute the total (a) budgeted selling expense and (b) budgeted general and administrative expense.