3. A company produces battery packs that have the following sales profile Demand (Units) 12,000 13,000 18,000 21,000 Prob. Sale Unit Price S Prob. 12.50 13.75 5.00 21.25 0.25 0.30 0.20 0.25 0.15 0.30 0.35 0.20 Calculate the Mean and the Standard Deviation (SD) of their gross income from the sale of this product. Their production cost is estimated to be $165,000, regardless of the number of units produced. What is the probability that they will loose money by producing these battery packs