A 1 mL aliquot from a bacterial sample is added to 9 mL of diluent in the first tube, and the process repeated multiple times. 0.1 mL from each is used for spread plates and incubated overnight. The countable plates yielded the following colony counts: 200 colonies on the 10^-5 dilution plate and 20 colonies on the 10^-6 dilution plate. Calculate the viable count of bacteria in the original sample. 

Remember:  CFU/ mL = number of colonies x dilution factor / volume plated in mL