Joe’s snow removal's cost formula for its vehicle operating cost is $1,060 per month plus $429 per snow-day. for the month of january, the company planned for activity of 11 snow-days, but the actual level of activity was 13 snow-days. the actual vehicle operating cost for the month was $6,310. the activity variance for vehicle operating cost in january would be closest to:
a. $531 u
b. $531 f
c. $858 u
d. $858 f

Jimmy's delicatessen sells large tins of tom tucker's toffee. the deli uses a periodic review system, checking inventory levels every 88 days, at which time an order is placed for more tins. order lead time is 22 days. daily demand is a constant 1515 tins, so average demand during the reorder period and order lead time (1010 days) is 150150 tins. draw a sawtooth diagram. assume that the beginning inventory level is equal to the restocking level and the desired service level is 99.9%. what is the safety stock level? (hint: look at the formula for calculating restocking level.) what is the average inventory level? the safety stock level is average inventory level is __chart: time (10,20,30), tins (0,150) lines touching both axisthe safety stock level is 0 tinsthe average inventory level is 75 tins