Price Level Stock Maintanance

Dear All.

There is some issue with POS option, i need Maintain two selling price under retail price list, because due to price change there are inventory related to two price level

Item SP Inventory
Choco Ball 100g (Selling Price) 100.00 25 Nos
Choco Ball 100g (New Selling Price ) 120.00 100 Nos

How can i handle this kind of situation in Erpnext

There is an option to select the batch in item price. Have you checked the same?