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Arnold Conan, performed services for 600 on account to KPM company at the first of December, after two days, Arnold performed another service to KPM that was worth 500, half of it was on account. At the 30 th of December KPM paid 650 of the outstanding amount to Arnold Conan. After posting the entries the balances of the related accounts at Arnold are as the following: Select one: a. Cash 900, account payable 200, service revenues 1100 b. Cash 650, account receivable 450, service revenues 1100 c. Cash 500, account receivable 450, service revenues 1100 d. Cash 900, account receivable 200, service revenues 1100