I need help with the following questions I already have the answer but I'm still unclear on the calculation. For Q2, Q8, Q12, Q13

Question 2 1 out of 1 points At the Spring Valley Company Company, the cost of the personnel department has always been charged to production departments based upon number of employees. Recently, opinions gathered from the department managers indicate that the number of new hires might be a better predictor of personnel costs. Total personnel department costs are $282,000 Department A BC Number of employees 90 280 210 Number of new hires 15 12 11 If the number of new hires is considered the cost driver, what amount of personnel costs will be allocated to Department A? (Round any intermediary calculations to two decimal places and your final answer to the nearest dollar,) Correct Answer:$109,980