Commuter trains arrive at the Syokimau railway station at the rate of 15 trains per day. During each of these arrivals, the station reports an expected revenue amount of Ksh. 200, 000 from ticketing and the variance of the revenue amount is Ksh. 100, 000. Assume that total revenue collected from ticketing can be modelled using a compound Poisson process. Estimate the mean revenue for the month of September, and the variance in the total rainfall for the month