If you add 43 g of food in 350ml water and dilution of 1:6 is made, then from this dilution 1:9 is?

... made, and from this 1ml is added is added to 60ml of water, the 0.1 ml from this solution is plated and after incubation 143 colonies are counted. What is the total count per g of original sample:
The options are the following:
4.3 x 10^8
4.3 x 10^ (-8)
4.3 x 10^6
4.3 x 10^5