Shopping Around Math Task

Shopping Around:

What is the total amount shown in this picture?

1$, 1$, 10c, 10c, 10c, 10c, 10c, 10c, 10c and 5c.

There is 2 dollars and 75 cents.

Zoe bought a packet of cornflakes at two at two different supermarkets.

Cheap Food supermarket charged her 2$.75. Bag’n’ save charged her 2$.80.

How did each supermarket round their prices? Bag’n’ save rounds up and cheap food rounds down.

Is there any other way that supermarkets can round their prices?

I don’t know.