Mahan Consulting is a service organization that specializes in the design, installation, and servicing of mechanical, hydraulic, and pneumatic systems. For example, some manufacturing firms, with machinery that cannot be turned off for servicing, need some type of system to lubricate the machinery during use. To deal with this type problem for a client, Mahan designed a central lubricating system that pumps lubricants intermittently to bearings and other moving parts. The operating results for the firm for the previous year are as follows: Sales $974,880 Less: Variable expenses 534,234 Contribution margin $440,646 Less: Fixed expenses 264,300 Operating income $176,346 In the coming year, Mahan expects variable costs to increase by 4 percent and fixed costs to increase by 3 percent. Required: 1. What is the contribution margin ratio for the previous year? Enter your answer as a decimal value rounded to three places. Use the rounded value in subsequent calculations. 2. Compute Mahan's break-even point for the previous year in dollars. Round your answer to the nearest dollar. 3. Suppose that Mahan would like to see a 6 percent increase in operating income in the coming year. What percent (on average) must Mahan raise its bids to cover the expected cost increases and obtain the desired operating income? Assume that Mahan expects the same mix and volume of services in both years. In your computations, round contribution margin ratio to three decimal places (use the rounded value in subsequent calculations) and other values to the nearest dollar. Enter your final answer as a percentage rounded to one decimal place. % 4. In the coming year, how much revenue must be earned for Mahan to earn an after-tax profit of $175,000? Assume a tax rate of 40 percent. Round intermediate calculations and your final answer to the nearest dollar