Calculate the total amount in an account on December 1st, given monthly deposits and a 7.5% annual interest rate compounded monthly.

To calculate the total amount in the account on the first of December, we need to find the future value of each deposit up to the end of November (which is equivalent to the first of December).

The annual interest rate is $7.5\%$, compounded monthly.
So, the monthly interest rate is $i = \frac{0.075}{12} = 0.00625$.

We will calculate the future value (FV) of each deposit using the formula:

$$FV = P(1 + i)^n$$

where $P$ is the principal amount, $i$ is the monthly interest rate, and $n$ is the number of months the money is invested.

**1. Deposit of R1 60