If a perpetual inventory system is in use . a physical inventory count is not required because the Inventory account is updated for each purchase and sale. a physical inventory count is not required because the Inventory account is updated every time a transaction or event occurs. a physical inventory count should be taken at least annually. a physical inventory count is required because the Inventory account is not updated when inventory is purchased or sold.

 a physical inventory count should be taken at least annually

Explanation: That an inventory is perpetual does not discount the need for taking physical inventory at least once a year. This is important because it helps in the identification of shrinkage or shortages and to also test the accuracy of the perpetual records under use. Now, a perpetual inventory is a kind of inventory that tracks and records continuously, items as they are added to or subtracted from the inventory thus keeping it updated and aids in keeping the track of the cost of goods bought and sold.

a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.