Can someone explain how to do this?

The following are selected ledger accounts of Culver Corporation at December 31,2017 Cash Inventory 186,310 Salaries and wages expense (sales) $285,310 536,310 Salaries and wages expense (office) Purchase returns Sales returns and allowances 347,310 Sales revenue Unearned sales revenue Purchases Sales discounts Purchase discount:s Selling expenses Accounting and legal services Insurance expense (office) 4,276,310 16,310 80.310 73,310 143,810 84,310 18,310 33,310 118,310 2,787,310 Freight-in 35,310 28,310 70,310 34,310 25,310 55,310 94,310 49,310 37,310 Accounts receivable Sales commissions Telephone and Internet expense (sales) Utilities expense (office) Miscellaneous office expenses Rent revenue Casualty loss (before tax) Interest expense Common stock ($10 par) 9,310 241,310 71,310 177,310 901,310 Advertising expense Delivery expense Depreciation expense (office equipment) Depreciation expense (sales equipment) Culver's effective tax rate on all items is 34%. A physical inventory indicates that the ending inventory is $687,310. (1) (0.5 Point) Determine Net Sales (Write a formula with the accounts you used): (2) (0.5 Point) Determine COGS (Write a formula with the accounts you used): (3) (0.5 Point) Determine total selling expenses (Write a formula with the accounts you used): (4) (0.5 Point) Determine total administrative expenses (Write a formula with the accounts you used): (5) (0.5 Point) Determine Income tax expense (Write a formula with the accounts you used)