You are given the task of quantifying the number of bacteria in your soil sample. You combine 1 g of soil with 9 ml of PBS and made subsequent 1/10 dilutions by combining 100 ul of a dilution with 900 ul PBS. Say that when you plate 100 ul of a 10-5 dilution, you count 97 bacterial colonies. How many bacteria do you estimate were present in your initial 1 g soil sample? Be sure to include units in your answer. Briefly describe how you arrived at your answer.