Given: A table for Jane's savings and expenditures is given.
Required: To determine the money earned through waitressing (A) and the interest(B).
Explanation: Jane's aim is to save R1800 per month. If she saved R1800 for the period of 12 months, then the total money earned through waitressing is-
[tex]\begin{gathered} A=12\times1800 \\ =\text{ R}21600 \end{gathered}[/tex]
Now, she had R2000 already in the account. The interest she received on this amount is 5.5%. Hence, the amount of interest is-
[tex]\begin{gathered} B=\frac{2000\times5.5}{100} \\ =\text{R}110 \end{gathered}[/tex]
Final Answer: A=R 21600
B=R 110
