When you want to create a purchase order for one of your supplier go to main menu > databse > supplier
Main Menu > Database
Tocuh suppliers
select the supplier then tocuh Create order
You will see the products that are with the supplier on the box type the units you need then Finish
if you need to change the cost on one of the items tocuh on the amountof the item
On the following screen tocuh the cost box to change the price and then finish
Once the order is finished touch the box with the arrow to receive the items and update the iventory on the products that have been request
Remark: Purchase orders will be related to the products under the supplier
