Check my work Your boss would like you to estimate the fixed and variable components of a particular cost. Actual data for this cost over four recent periods appear below. Period 1 Period 2 Period 3 Period 4 Activity 31 30 27 32 Cost $385 $374 $ 356 $400 Using the least-squares regression method, what is the cost formula for this cost? Multiple Choice O y $12034 + $870X O O Y = $0.00 $15.51x O O Y = $128.04 + $8.36X O Y $133.47 + $5.60X O