ANSWER $625.8, I NEED DETAIL SOLUTION

In a present worth analysis of certain equipment, one alternative has a net present worth of +$400, based on a six-year analysis period that equals the useful life of the alternative. A 10% interest rate was used in the computations. The alternative device is to be replaced at the end of the six years by an identical item with the same cost, benefits, and useful life. Using a 10% interest rate, compute the net present of the alternative equipment for the 12-year analysis period