To produce a certain product, there are two competing processes under consideration. Process A requires acquisition of a new machine that is estimated to have an initial cost of $30,000 and a salvage value of $12,000 at the end of its useful life of 6 years. In addition, the process requires a fixed cost of $47,000 per year and a variable cost of $250 per day. Alternatively, Process B requires the use of human labor. The process will need 6 workers, each earning $100 per day and will have a fixed cost of $20,000 per year and additional variable costs of $200 per day. State the factor of interest to consider for this problem?( what is the main factor to consider)