need fast

The Larisa Company buys machinery on April 1, Year One, for $40,000 with an expected life of ten years and residual value of $10,000. The double-declining balance method is applied along with the half-year convention. The machinery is sold on September 1, Year Three, for $32,400. What gain should be reported on this sale? $3,600 $5,760 $9,360 $0