Will I be able to see the promotions applied and the total savings on my order?

Will I be able to see the promotions applied and the total savings on my order?

Yes, you will be able to see the promotion applied and the total savings on your order. The summary section of the transaction receipt reflects the promotion name; it also displays the total amount that you have saved on that transaction due to that promotion. 
To be able to set up and configure in-store offers and promotions you must activate the Offers, Discount, and Pricing Management plugin. Promotions configured in the application are set to apply automatically when a certain condition is met.
Plugins in Tagrain are either Subscription Based or License Based. So the price that you pay for your plugins is based on the number of POS terminals that you have in your setup and the number of licences that you have acquired.
There will be no change in your subscription amount in the current billing cycle if you are only deactivating the Offers, Discount, and Pricing Management plugin AND not updating your Store / POS count.