I am learning accounting and have these problems. But i don't understand at all, can anyone help me. Thanks for your attention. Im looking forward to your reply.

Jane and Candy were interested in starting part-time business activities. Both heard a presentation by the manufacturer of an exercise device and decided to become a distributor of this exerciser. Jane and Candy have different business. To attract distributors, the manufacturer made price concessions on the first 1,000 units purchased. The manufacturer sold the first 200 units at $15 each, the next 300 at $18 per unit, and the next 500 at $19 per unit. After that, distributors had to pay $20 per unit. During the first year, each bought 1,200 units, coincidentally, both sold exactly 950 units for $27 each. Jane had $2,600 of selling expenses (Jane distributed colour-printed leaflets to everyone she met on the streets): Candy incurred $1,700 of selling expenses (Candy used Facebook advertising targeting at people who care for health and want to exercise at home, especially when there is a pandemic). At the end of the year, both had to determine their net incomes. Jane received a B in the accounting course she took at university. She remembered the FIFO inventory method and plans to use it. Candy knows nothing about inventory costing methods, but her boyfriend knows LIFO inventory method used at the company where he works and does the calculation using LIFO method. 1. Determine the cost of merchandise inventory purchase for Jane and Candy. Present your detailed calculation. 2. Calculate the cost of goods sold and cost of ending inventory for Jane and Candy. Present your detailed calculation. 3. Prepare the single-step income statements for Jane and Candy. 4. Which business has performed better? Explain why. Give your recommendations to improve the business profit