Price options displays the option to lock prices. If you wish to set an order at a specific price you can "lock" any of the totals.
•Place a tick in the box to Lock Prices.
•You can click in any of the boxes to set a new selling price.
•When you have made a change you will be prompted to recalculate the totals. Click "yes" and the other totals will be immediately recalculated.
•Click OK to return to the quote.
Note that if you have a locked price and show individual prices or sub-totals on the quote printout they will not add up to the grand total. You need to change the print preferences so you only show the grand total. The total on screen will show a padlock 
when a price has been locked.
The costings screen will also inform you that the prices have been locked and normal calculations do not apply.
Price Options should not be used if you enable invoicing from the delivery note.