Prevent requistion lines from combining in Purchase Order

If a Purchase requisition has 2 lines for the same supplier that have the same Inventory Item but different unit prices is there a way to have them appear on 2 separate lines when the Purchase Order is created.

For example the requisition has 2 lines for Item # 123

Line 1 - Item # 123 - qty 10 , Unit Price 100.00

Line 2 - Item # 123 - qty 100, Unit Price 50.00

When the Purchase Order is created there is only one line with qty 110 and only allows for one Unit Cost

When i add another line and separate the quantities I get an error message that the quantities don't match and am unable to create the Purchase Order