A shopper bought 19 items from a till slip. One of these items was Microwave Popcorn Butter 3 @ A for R32.97. Calculate A, the price per unit of the microwave popcorn.

Here are the solutions to your questions based on the till slip:

1. How many items did Ms Sibiya buy?
To find the number of items, we count each distinct product line on the till slip.
There are 19 distinct items listed.
Answer: $\boxed{\text{19 items}}$

2. Calculate A, the price per unit of the microwave popcorn.
The till slip shows "Microwave Popcorn Butter 3 @ A" with a total cost of 32.97.
To find A, we divide the total cost by the quantity.

$$A = \frac{\text{Total cost}}{\text{Quantity}}$$ $$$$