Stellar Company had cash receipts from customers in 2020 of $ 119,550. Cash payments for operating expenses were $ 100,010. Stellar has determined that at January 1, accounts receivable was $ 11,880, and prepaid expenses were $ 15,460. At December 31, accounts receivable was $ 16,130, and prepaid expenses were $ 23,160. Compute (a) service revenue and (b) operating expenses.

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.

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