Bad attitude

I was at Clicks Mabopane yesterday afternoon and I wanted to buy a hand sanitizer. I saw on them shelves and they were five of them while the peraon I spoke to was still something along the same aisle. I askes her about the price of the sanitizers and she told me that they were R99 each. My collegue went to the same store to get sanitizers and she bought for R39 some less price of what I was told about. Why is it that I was told about a different? Is it because they want to keep these sanitizers for themselves or what?