Analyze each transaction. Under each category in the accounting equation, indicate whether the transaction: A. increases, B. decreases, or C. has no effect. The item (a) is provided as an example. (a) Provided services to a customer on account. (Revenue increases causing Stockholders' Equity to increase, Assets increase, and no effect on Liabilities). 6. Purchased supplies and paid for them at the time of purchase. 7. Used the supplies in serving a customer. 8. Purchased equipment by signing a note. Stockholders' Equity Asset Liability (a) 6. 7. 8. 9. At the beginning of January, the balance in the Retained Earnings account is $300,000 for TR Corporation During the month of January, TR had the following external transactions