Exercise 5-64 Sales and Sales Returns and Allowances Rubin Enterprises had the following sales-related transactions on a recent day: Billed customer $27,500 on account for services already provided. Collected $5,875 in cash for services to be provided in the future. The customer complained about aspects of the services provided in Transaction a. To maintain a good relationship with this customer, Rubin granted an allowance of $1,500 off the list price. The customer had not yet paid for the services. Rubin provided the services for the customer in Transaction b. Additionally, Rubin granted an allowance of $350 because the services were provided after the promised date. Because the customer had already paid, Rubin paid the $350 allowance in cash. Required: Prepare the necessary journal entry (or entries) for each of these transactions.