If Ant Corporation AR has a balance of 20,000, Allowance for doubtful accounts has a credit balance on January 1 of 5000 and the company writes off 700 by how much had the net realizable value changed?

Show the required journal entry under the Allowance method if Ant receives the 700 the had previously written off.

first part is just the number of change and the second is a journal entry. thank you!