By clicking the Order - summary report type the program will print the purchase order in summary by the item ID. If the same item occurs in the purchase order more than once, this report type will joint these lines into one record. 

However, all so joined lines must have the same price and other sales conditions or the report will be incorrect!

The function is useful, when the order is created by using the Add function or the automatic creating purchase orders function. In this case, there can be in the purchase order more lines of the same item with the same price and by using the report function they can be joined into one record.