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Great American Oilchange (GAO) sells a combined oil change service and parts package for $34, A customer who supplies the parts (oil and filter) is charged $24 for only the service. whereas o customer who buys only the ol and filter (for do-it-yourself use) is charged $24 for the parts. The parts cost GAO $18. would record if GAO provides a combined oil change service and parts package to a customer on October 7. Assume GAO distinguishes Service Revenue from Sales Revenue arising from the sale of parts, it uses a perpetual inventory system for recording the cost of goods sold, and it collects cash the day the oil change is performed. (If no required for a transection/event, select "No Journel Entry Required" in the first account field.)