Sales return of previous year sales

Thanks for responding. I have entered the quantity. Everything is good but for the value which is blank. The quantity of all other stock items is displaying with quantity and value except for this credit note entry.  .

I have configured this (F12) and got this one right but not the other 2 above displayed images shared.

Use default valuation for closing stock ? NO (else uses outward value - inward value.

This is to inform you that the problem is solved now. I had only to pass an additional entry in the inventory vouchers > stock journal. On both the sides of the stock journal, I had to enter the name of the item, Qunatity, Rate and Amount. It is good now. Thank you everyone for your suggestion and help.

This is to inform you that I have found the correct solution for my above post. Passing the stock journal was optional as I did not have any other idea to do it otherwise. 

The right solution for the above is

edit the stock item > press F12 > stock item configuration > Enable standard rates for stock items (Yes)> Save > Alter standard rates > Yes > In the standard cost > enter date in Applicable from > enter purchase price in Rate and save.

You are done.