please solve part B and explain how to get the 43 and the 700 from the 30k/700=43

Cranston pays regular-time wages of $6,000 per employee per period for any time worked up to 600 hours (including undertime). The overtime pay rate is $15 per hour over 600 hours. Hiring, training, and outfitting a new employee costs $8,000. Layoff costs are $2,000 per employee. Currently, 40 employees work for Cranston in this capacity. No delays in service, or backorders, are allowed. a. Prepare a chase strategy using only hiring and layoffs. What are the total numbers of employees hired and laid off? b. Develop a workforce plan that uses the level strategy, relaying only on overtime and undertime. Maximize the use of overtime during the peak period so as to minimize the workforce level and amount of undertime. c. Propose an effective mixed-strategy plan. d. Compare the total costs of the three plans. Solved Problem 1