Question

Her income comes ----- 20000 a month fill blank with preposition

Answer 1

Answer:

in

Explanation:

i am not sure about it

Answer 2

Answer:

Her income comes to 20000 a month.

Explanation:

Comes to is a phrasal verb that refers to a cumulative summation of an amount. A phrasal verb is an idiom that contains a verb or an adverb along with a preposition and expresses a meaning unrelated to its constituent. Example: Break down means to be upset or when any machine or gadget stops working.

Here comes to denotes to add up to or estimates something. Therefore it is the most suitable option in this case.