Dr. Chester is a cash-basis taxpayer. His office visit charges are usually paid on the date of visit or within 1 month. However, services rendered outside the office are billed weekly and are usually paid within 2 months as patients collect from insurance companies. Information relating to Year 1 is as follows: Cash received at the time of office visits $ 35,000 Collections on accounts receivable 130,000 Accounts receivable, January 1 16,000 Accounts receivable, December 31 20,000 Dr. Chesters gross income from his medical practice for Year 1 is