Please help and explain

Two years ago, Hoarding Corp, purchased machinery for $2.200,000. At the end of last year, the machinery had a fair value of $1,700,000. Assuming Hoarding uses the revaluation model, what amount if any, is recognized in Hoarding's net income this year if the machinery's fair value is $2,550,000? $500,000 $850LDOO 50