3. Assume that you are a retailer and you sold the items below. Prepare an invoice using Excel. 2 dozens 10 pairs 12 pieces T-shirts Shoes bags 250.00.pc. 850.00/pair 200.00/pc 4. Use Excel to compute for the net invoice price of the following merchandise: Item Stainless steel dishwasher 6.2 cu. ft. refrigerator 24 cu. ft. French door refrigerator List Price 3,750.00 42,957.00 96,148.00 Trade Discount 10% 10% and 5% 5% and 5% 5. A meat vendor decided to give a 10% discount on all her merchandise. Use Excel to compute the total net selling price of her inventory. Quantity 50 kilograms 50 kilograms 50 kilograms 50 kilograms 20 kilograms 20 kilograms Item Pork lion Choice beef cuts Beef ribs Pork ribs Pork bones Beef bones Gross Selling Price 210.00/kg 300.00/kg 280.00/kg 200.00/kg 80.00/kg 100.00/kg 6. Use SPSS to find the mean and standard deviation given the following data: 5.00 6.00 3.00 7.00 5.00 7. Use SPSS to find the mean and the standard deviation given the following data: 8.50 9.50 7.00 6.50 5.75 8. Use SPSS to find the mean and the standard deviation given the following data: 11.00 12.00 10.00 5.00 6.00