PainFree sells its main product, ergonomic mouse pads, for $12 each. Its variable cost is $5.40 per pad. Fixed costs are $215,000 per month for volumes up to 65,000 pads. Above 65,000 pads, monthly fixed costs are $285,000. Prepare a monthly flexible budget for the product, showing sales revenue, variable costs, fixed costs, and operating income for volume levels of 40,000,55,000, and 75,000 pads