Byron’s income last year was $61,700. he made $48,000 at his plumbing job and had income from an apartment that he rented out. if byron earned the same amount of rent each month for the entire year, approximately how much per month did he collect? a. $940 b. $1,140 c. $4,000 d.$5,140

The amount of money he collected through the rental is the difference between the total amount and the amount he earned through his plumbing job. That is,
                                   rental = $61,700 - $48,000 = $13700
Divide this value by the number of months in a year. 
                              rental per month = $13700 / 12 = $1141.7
Thus, he collected approximately $1140 per month. The answer is letter B. 

I suppose you mean how much per month did he collect for the appartment.

Income from apartment for the years = $61,700 - $48,000 = $13,700
Amount collected per month for apartment = $13,700/12 = $1,140 approximately.