The fuel input rate of a gas-fired generating unit is approximated as follows:
![1972_eaaf8e5f-b007-4c2e-8f86-a0eb32d97c4c.png](https://secure.tutorsglobe.com/CMSImages/1972_eaaf8e5f-b007-4c2e-8f86-a0eb32d97c4c.png)
where PG is the 3∅ power output in MW. If the cost of gas is $5 per MBtu, find
(a) The fuel input rate when the unit is delivering 100 MW
(b) The corresponding fuel cost in dollars/hr
(c) The incremental cost in dollars/MWh
(d) The approximate cost in dollars/hr to deliver 101 MW