I need help with these 3 questions; if you could explain it step by step with a clear answer that would be very helpful!

In its first month of operations, Whispering Winds Corp. made three purchases of merchandise in the following sequence: (1) 135 units at $6, (2) 420 units at $7, and (3) 140 units at $8. (a1) * Your answer is incorrect. Calculate the average unit cost. (Round answer to 2 decimal places, e.g. 15.25.) In its first month of operation, Wildhorse Co. purchased 340 units of inventory for $5, then 440 units for $6, and finally 380 units for $7. At the end of the month, 420 units remained. The company uses the periodic method. Compute the amount of phantom profit that would result if the company used FIFO rather than LIFO. Pharoah Company reports net income of $62,500 in 2020 . However, ending inventory was understated $9,500. What is the correct net income for 2020 ? Correct net income for 2020 $