1. The problem asks for the number of days in September when Kofi had no less than 900. 2. "No less than 900" means Kofi had at least 900, or $\geq 900$. 3. To answer, we need data on Kofi's daily amounts for September. 4. Since no data is provided, we cannot determine the exact number of days. 5. Please provide Kofi's daily amounts for September to proceed with the calculation.