Calculate Mrs. Havana's total monthly deductions and annual gross salary.

Havana's monthly medical aid contribution.
The total medical aid premium is R1 200 per month. The employer contributes R2.00 for every R1.00 Mrs. Havana contributes. This means Mrs. Havana pays $\frac{1}{3}$ of the premium, and the employer pays $\frac{2}{3}$.

$$\text{Mrs. Havana's contribution} = \frac{1}{1+2} \times \text{R}1\,200 = \frac{1}{3} \times \text{R}1\,200 = \text{R}400$$

The employer's contribution is $2 \times \text{R}400 = \text{R}800$.

Havana's monthly pension fund contribution.
Mrs. Havana's monthly salary is R17 300. She contributes 7.5% of her monthly salary to the pension fund.

$$\text{Mrs. Havana's pension contribution} = 7.5\% \times \text{R}17\,300 = 0.075 \times \text{R}17\,300 = \text{R}1\,297.50$$

Havana's total monthly deductions from her salary.
This is the sum of her medical aid contribution and her pension fund contribution.

$$\text{Total monthly deductions} = \text{R}400 + \text{R}1\,297.50 = \text{R}1\,697.50$$

Havana's annual gross salary.
Her monthly salary is R17 300.

$$\text{Annual gross salary} = \text{R}17\,300 \times 12 = \text{R}207\,600$$

• Mrs. Havana's monthly medical aid contribution: $\boxed{\text{R}400}$
• Mrs. Havana's monthly pension fund contribution: $\boxed{\text{R}1\,297.50}$
• Mrs. Havana's total monthly deductions: $\boxed{\text{R}1\,697.50}$
• Mrs. Havana's annual gross salary: $\boxed{\text{R}207\,600}$