On October 1, 2021, Helen Kennedy opened an advertising agency. Oct. 1 Helen Kennedy invested $70,000 cash in the business. Oct. 2 Paid October office rent of $4,000; issued Check 1001. Oct. 5 Purchased desks and other office furniture for $18,000 from Office Furniture Mart, Inc.; received Invoice 6704 payable in 60 days. Oct. 6 Issued Check 1002 for $4,100 to purchase art equipment. Oct. 7 Purchased supplies for $1,670; paid with Check 1003. Oct. 10 Issued Check 1004 for $800 for office cleaning service. Oct. 12 Performed services for $4,200 in cash and $1,800 on credit. (Use a compound entry.) Oct. 15 Returned damaged supplies for a cash refund of $300. Oct. 18 Purchased a computer for $3,000 from Office Furniture Mart, Inc., Invoice 7108; issued Check 1005 for a $1,750 down payment, with the balance payable in 30 days. (Use one compound entry.) Oct. 20 Issued Check 1006 for $9,500 to Office Furniture Mart, Inc., as payment on account for Invoice 6704. Oct. 26 Performed services for $4,800 on credit. Oct. 27 Paid $375 for monthly telephone bill; issued Check 1007. Oct. 30 Received $4,200 in cash from credit customers. Oct. 30 Mailed Check 1008 to pay the monthly utility bill of $1,080. Oct. 30 Issued Checks 1009-1011 for $9,000 for salaries.