An explanation of how the values are found would be greatly appreciated!!

Exercise 4-1 Computing revenues, expenses, and income LO C1, C2 Fill in the blanks in the following separate income statements a through e. (Amounts to be deducted should be indicated by a minus sign.) d b a C 62,000 43,400 37,000 26,000 Sales Cost of goods sold Merchandise inventory (beginning) 16,140 8,100 5,900 7,100 4,320 Total cost of merchandise purchases 43,000 44,000 5,100 Merchandise inventory (ending) (8,200) (2,800) (5,500) Cost of goods sold 33,700 19,000 6,700 Gross profit 3,100 42,400 Expenses 12,000 10,990 11,840 7,500 3,700 13,410 (8,740) 38,700 Net income (loss)