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 33 32 29 34 Cost $ 387 $ 376 $ 360 $ 404 Using the least-squares regression method, what is the cost formula for this cost? Multiple Choice O Y -$124.32 + $5.45X O Y = $118.89 + $8.21X Y = $0.00 $15.36X Y-$110.99 + $8.55X