Sweeney & Allen, a large marketing firm, adjusts its accounts at the end of each month. The following information is availabie for the year ending December 31. 1. A bank loan had been obtained on December 1. Accrued interest on the loan at December 31 amounts to $1,300. No interest expense has yet been recorded. 2. Depreciation of the firm's office building is based on an estimated life of 30 years. The bullding was purchased four years ago for $320,000 3. Accrued, but unbilled, revenue during December amounts to $66.000 4. On March 1, the firm paid $1,700 to renew a 12 -month insurance policy. The entire amount wos recorded as Prepald insurarice. 5. The firm recelved $15,000 from King Biscult Company in advance of developing a six-month marketing campaign. The entire amount was initilly recorded as Uneamed Revenue. At December 31, $4,000 had actuolly been eamed by the firm. 6. The company's policy is to pay its employees every Fiday. Since December 31 fell on a Wednesday. there was an acciued habisity tor salaries amounting to $2.100 a. Record the necessary adjusting joutnal entries on December 31. b. By how much did Sweeney \& Allen's net income increase of decrease as a resut of the adjusting entries performed in part a ? (ignore income taxes.)