6. (problem 3.20) the break-even point is to be determined for two production methods, one manual and the other automated. the manual method requires two workers at $16.50 per hour each. together, their production rate is 30 units per hour. the automated method has an initial costs of $125,000, a 4-year service life, no salvage value, and an annual maintenance costs = $3000. no labor is required for the machine. the variable cost for the machine is $10.00/hr. the production rate for the automated machine is 55 units per hour. a) determine the break-even point for the two methods, using a rate of return = 25% b) how many hours of operation per year would be required for each method to reach break-even point?