One hundred compressors of 200 H.P. rating are being considered for purchase by the state highway department. The consumer price index was 400 five years ago and is 520 today. The cost of 150 H.P. compressors bought five years ago is as follows. For the first 50 compressors the cost was $2,000 per unit, and for the second 50 the cost was $2,400 per unit. Find the cost of 100 compressors of 200 H.P. rating today.