On the AppScenic Formulas, set under Products in your AppScenic Account, you need to choose from the following for your Formula Type:

Addition/Profit (+) if you want to make a profit and increase your price for some products for a specific period.

Subtraction/Discount (-) when you want to offer a discount to your customers for a range of products during a certain period. 

So, with AppScenic Formulas you can either choose to increase the price and make a profit for a range of products or offer a discount and decrease your price for some products. You can also set a specific period of time for every formula you create.  

More on how to use your Formulas here.