Answer:
100ml bottle is cheapest per ml
Step-by-step explanation:
The 80 ml bottle sells for 55 so that makes 80 ml for 5500 p which calculates to 68.75p per ml.
the 2 50 ml bottles will cost 45+22.50 = 67.50 which makes 100 ml for 6750p
this makes it 67.5p per ml which is cheaper than the 80 ml bottle
