Error: Min/Max calculation

Hi All,

1. I am trying to calculate Minimum cost , Maximum cost, Average cost per Item.

2. In my Sales Table, I have Total cost and Quantity column

3. I have used Divide Function to Total cost/ Qty = Get Unit price( giving wrong output)

4. When I am applying MIn/ Max to calculated column , I am not getting true value

5. When I am calculating unit price measure I am getting right answer for Unit price. But I am not able to apply MIN/MAX function to measure.

Can anyone please help me