5. Assume the current sales mix remains the same as expected in the quarter; determine the sales revenue (in total and by product line) necessary for the division to achieve $80,000 after-tax prot. 6. CHALLENGE! Pittsburgh Tools is considering increasing its advertising for the quarter, adding $10,000 of advertising expenses. Historically, sales volume increases uniformly across the product lines by 1% for each $5,000 of additional advertising budget. Is this worthwhile