Note: If you have a Multiple Store and for your business strategy then you need to setup different Selling Price between one store to another store. Such as, in Store 1, because demand is very high in that area, then you can have a higher selling price from Store 2.
You can setup this from your iREAP POS Pro Account from Web.
Here's the steps:
Open browser and go to www.ireappos.com
Click login iREAP POS Pro
Enter your email address and password [(administrator account)email address account that had been registered for the first time when you creating your company with your iREAP POS Pro]
Go to main page of your iReap Pos Pro
Go to menu Master Data > Product
In List of your product, choose the product that have a different price , then click edit
You will go to detail of the selected product, and Click Price By Store
You will go to next windows for setup the price for each store,
Select the store, then setup the price, and Click 
If you want to edit the price of a store then click 
, after editing click 
for saving the update
iREAP POS : iREAP stand for Integrated Retail Application, is an application designed and developed to help you managed and run store operation, consists of Point of Sale / Cashier system and inventory control system.