I need help solving a, b, c, and d please.

Exercise 23-10 Following are selected balance sheet accounts of Monty Bros. Corp. at December 31, 2017 and 2016, and the increases or decreases in each account from 2016 to 2017. Also presented is selected income statement information for the year ended December 31, 2017, and additional information. Selected balance sheet accounts Increase 2017 2016 (Decrease) $34,100 $24,100 $10,000 Accounts receivable Property, plant, and equipment 275,900 249,500 26,400 Accumulated depreciation-plant assets (179,200) (167,800) (11,400) 2017 Liabilities and stockholders' equity 2016 Increase 49,500 Bonds payable $46,300 $3,200 Dividends payable 4,900 8,000 3,100 Common stock, $1 par 21,800 19,000 2,800 Additional paid-in capital 9,100 3,100 103,300 90,300 6,000 13,000 Retained earnings Selected income statement information for the year ended December 31, 2017: $156,100 Sales revenue 38,400 Depreciation Gain on sale of equipment 14,500 Net income 31,300