How many customers did Steve start with if he has 130 at the end of September and gained 20 new customers?

To determine how many customers Steve started with, we need to consider his ending customer count and the number of new customers he gained. If Steve has 130 customers at the end of September and gained 20 new customers during that period, we can calculate his starting number by subtracting the new customers from the final total.

The calculation is as follows:

130 (final customers) - 20 (new customers gained) = 110 (starting customers).

Thus, Steve began with 110 customers. In this context, the answer B (120) is incorrect because it does not account for the gain of the new customers accurately. Instead, the correct starting point is 110 customers.