Al is a medical doctor who conducts his practice as a sole proprietor. During 2020, he received cash of $615,400 for medical services. Of the amount collected, $56,400 was for services provided in 2019. At the end of 2020, Al had accounts receivable of $98,200, all for services rendered in 2020. In addition, at the end of the year, Al received $16,500 as an advance payment from a health maintenance organization (HMO) for services to be rendered in 2021. Required:

Compute Al's gross income for 2020.

The following transactions occurred during july: received $1,000 cash for services provided to a customer during july. received $4,000 cash investment from bob johnson, the owner of the business received $850 from a customer in partial payment of his account receivable which arose from sales in june. provided services to a customer on credit, $475. borrowed $7,000 from the bank by signing a promissory note. received $1,350 cash from a customer for services to be rendered next year. what was the amount of revenue for july?