Please understand that once a price has been negotiated as of July 2015 the prices cannot increase as you have done.
Column 2 on the spread sheet (New Cost 20/07/2015) is the highest price we are willing to pay at the current time.
In your new column last on the spread sheet you have increased some items that must be bought back to the price in Column 2 on the spread sheet (New Cost 20/07/2015), The prices that have been discounted should remain the same as they are in the last column.
I have updated the prices in the last column to reflect the correct prices and the price we are willing to accept.
Please confirm ASAP