Why quantities appears at the extreme right while Calculating Price on Estimate?

Question: Why the Quantities appears at the extreme right while Calculating Price on Estimate?
 
 
Answer: While calculating the price on Estimate I entered quantities as 250,500,0,0 however after hitting on calculate price the results displays as 0,0,250,500.
 
 
Once you Calculate price while creating Estimate the though you enter the quantity in any format on the above five columns however it will always provide the result in the Ascending Order format.