Johnson Lighting sold a light fixture (cost of $400 ) for $600 to a customer. The customer paid cash. The sales price included a one-year service contract valued at $50. One of the journal entries for the sale of the light fixture would be: debit to Cash for $600; credits to Sales Revenue for $550 and to Unearned Revenue for $50. debit to Cash for \$600: credit to Sales Revenue for $600. debits to Sales Revenue for $550 and to Unearned Revenue for $50; credit to Cash for $600. debit to Sales Revenue for $600; credit to Cash for $600