Analyze each of the following transactions by showing the effects on the accounting equation-specifically, identify the accounts and amounts (including + or -) for each transaction. (Enter all amounts as positive values.) a. The company provides $21,600 of services on credit. b. The company estimates that $960 of its accounts receivable is uncollectible. c. The company writes off a customer's entire $460 account as uncollectible. Assets a. Accounts receivable () increase 21,600 b. Allowance for doubtful accounts (-) decrease 960 c. Allowance for doubtful accounts (+) increase 460 c. Accounts receivable (-) decrease 460 Liabilities