Can I have examples on step by step to solve the problem

Cost April 2 Purchase $103 April 15 Purchase 107 April 20 Purchase 111 Total m $321 Average cost per unit $107 ($321 - 3 units) Assume that one unit is sold on April 27 for $152. Determine the gross profit for April and ending inventory on April 30 using the (a) first- in, first-out (FIFO); (b) last-in, first-out (LIFO); and (c) weighted average cost method. Gross Profit Ending Inventory a. First-in, first-out (FIFO) LO b. Last-in, first-out (LIFO) c. Weighted average cost