On December 31, 2018, Ditka Inc. had Retained Earnings of $270,800 before its closing entries were prepared and posted. During 2018, the company had service revenue of $171,100 and interest revenue of $82,800. The company used supplies in the amount of $89,400, advertising expenses were $16,700, salaries and wages totaled $18,750, and income tax expense was calculated as $14,300. During the year, the company declared and paid dividends of $6,300. Required: a. Prepare the closing entries dated December 31, 2018. b. Prepare T-account for the Retained Earnings account. Enter the beginning balance into the T-account, post the closing entries, and then determine the ending balance