Please help me with these 3 questions. I have several days attempting to get the right answer and everything I put in the system is wrong. I am very frustrated. Thank you!

Average-Cost Method: Perpetual Inventory System Assume the following data with regard to inventory for Vegan Company: Aug. 1 Inventory 40 units @ $10 per unit $ 400 8 Purchase 50 units @ $11 per unit 550 22 Purchase 35 units @ $12 per unit 420 Goods available for sale 125 units $1,370 Aug. 15 Sale 28 Sale Inventory, Aug. 31 45 units 25 units 55 units Calculate the cost of ending inventory and cost of goods sold according to the average-cost method under the perpetual inventory system. In your calculations round average unit cost to the nearest cent and round all other calculations and your final answers to the nearest dollar. Average-Cost Method Cost of ending inventory: $ 600 Cost of goods sold: $ 767 Please read the instructions well. I have 3 days trying to figure out the answer and the rounding Short Exercise 6-9 LIFO Method: Perpetual Inventory System Assume the following data with regard to inventory for Vegan Company: Aug. 1 Inventory 40 units @ $10 per unit $ 400 8 Purchase 50 units @ $11 per unit 550 22 Purchase 35 units @ $12 per unit 420 Goods available for sale 125 units $1,370 Aug. 15 Sale 28 Sale Inventory, Aug. 31 45 units 25 units 55 units Calculate the cost of ending inventory and cost of goods sold according to the LIFO method under the perpetual inventory system. LIFO Method Cost of ending inventory: $ Cost of goods sold: $ Please read the instructions well. I have 3 days trying to figure out the answer and the rounding Short-Term Liquidity Ratios Wellman Company has cash of $80,000, net accounts receivable of $180,000, and net sales of $1,440,000. Last year's net accounts receivable were $140,000. Compute the following ratios: (Round days' sales uncollected answer to nearest whole day. Assume 365 days in a year.) a. Receivables turnover: times 9 b. Days' sales uncollected: days 45.63 Need help with the Days's sales collected