can you explain without using excel

Sales 474 485 501 4) Some company sales by month are shown as below: Month January February March April May Junc July August September October November December 588 579 673 594 679 608 699 732 732 Owner decides that the safest forecasting approach is exponential smoothing with an alpha of 0.8. He/ She uses the January demand and the January forecast just to get the ball rolling. Generate a forecast for the year using this technique and then calculate forecast errors using MSE. What is the mean squared error for this forecasting approach? A) 3462 B) 4010 C) 3656 D) 3844 5) Given an EOQ model with shortages in which annual demand is 5000 units, the cost of placing an order is $120, annual carrying and shortage costs are $15 and S40 per unit per year, respectively, what is the maximum planned shortage, s"? A) 331 B) 90 C) 115 D) 82