Launching A Sale, Not Working

I was trying to launch a sale and I was looking at the wiki page for it;

https://quirm.net/wiki/eshop/setting-up-using-eshop/launching-a-sale/

But what it says isn’t what I see…. where it shows the sale price column where you should be able to put in sale prices, I don’t have that.

See the screencap of what I see;

https://donations.needtakehave.com/—-/books/cap.png

https://www.ads-software.com/plugins/eshop/