Go on your AppScenic Account, click on My Products, and then on Price Formulas. 

Right above the search field on Price Formulas, you will see the button New Price Formula.

Click on it and start creating your new fomula, here are the field you need to complete:

Price Formula Name: Where you need to give a name to your formula.

Min, Max, Profit %, Fixed Price and Round up are essential parts of your formula, so pay extra attention to all these fields: 

- You have to add the minimum and maximum price range of the products where your formula can be applied; 

- Under the Profit or/and Fixed Profit you need to add the percentage plus the fixed profit you want to make when selling the product(s);

- The last check box Round Up is an optional field, so you only check if you want to round up the price.

Define Interval: Check this box if you want to make your formula available for a specific period of time.

Use compare at price (this is a sale price formula): Check this box if your store supports this feature - compared at price/crossed prices. The markup price will show as crossed and your formula price as the product price. For example, 30$ would be the formula price and 50$ the crossed price. 

Include shipping cost to main location in the product price: Check this box if you want the cost of shipping the product to your main location to be added to the product price after the formula has been applied. 

That’s what Formulas are and the fields you have to fill in to have a functional formula! :)

See this article for more details: What is a sale price formula and how does it work?