XYZ Company uses the high-low method to analyze mixed costs. During the year, the highest level of activity was in May and the lowest evel of activity was in February. In February, the company worked 11,00 hours and had a total cost of $46,300. In May, the company worked 27,000 hours and had a total cost of $110,300. What is the estimated total cost at an operating level of 19,000 hours? Select one: a. $78,300 b. $86,300 c. $82,300 d: $48,300 e. None of the answers given XYZ Company's accountant is estimating next period's total overhead costs (Y). She performed three regression analyses, the first is based on direct labor hours (DLH), the second is based on machine hours (Mhr), and the third is based on quantity produced (Q). The results were: [Y=$95,000 + $9XDLHR-square = 0.85); TY= $120,000 + $5xMhr, R-square = 0.15); [Y=190,000+20; R-square=0.45). How much of the variations on the overhead costs is explained by the quantity produced (0)? Select one: a. 85% b. None of the answers given c. 55% d. 45% e. 15%