Monty corp. purchased a new machine on october 1, 2019, at a cost of $124,000. the company estimated that the machine will have a salvage value of $15,000. the machine is expected to be used for 10,000 working hours during its 4-year life. compute the depreciation expense under units-of-activity for 2019, assuming machine usage was 1,860 hours. (round depreciable cost per unit to 2 decimal places, e. g. 0.50 and depreciation rate to 0 decimal places, e. g. 15%. round final answer to 2 decimal places, e. g. 2,125.25.)

Thomas kratzer is the purchasing manager for the headquarters of a large insurance company chain with a central inventory operation. thomas's fastest-moving inventory item has a demand of 6,000 units per year. the cost of each unit is $100, and the inventory carrying cost is $10 per unit per year. the average ordering cost is $30 per order. it takes about 5 days for an order to arrive, and the demand for 1 week is 120 units. (this is a corporate operation, and the are 250 working days per year.)a) what is the eoq? b) what is the average inventory if the eoq is used? c) what is the optimal number of orders per year? d) what is the optimal number of days in between any two orders? e) what is the annual cost of ordering and holding inventory? f) what is the total annual inventory cost, including cost of the 6,000 units?