To move in, Janet had to pay 2 months worth of rent so that would cost 2*1250 = $<<2*1250=2500>>2,500
On top of the rent she needed to pay a deposit of $500 so 2500+500 = $<<2500+500=3000>>3,000 total to rent the apartment
If it cost $3000 to move in and she had $2225 then she need 3000-2225 = $<<3000-2225=775>>775 more
#### 775