To create price functions go to; 

Admin > Tenders > Price Functions.

Price functions are used for the margin, rounding and padding of your pricing.

They will be referenced throughout the tender setup process and used in the price levels, options, categories and house types.

There will be a default price function of $0.00 already available for you.

You can add additional functions such as; a margin of 15% if you like. 

You can name these anything that makes sense to you.

You can have multiple margin calculations on the cost price based on the price function.

Click on: 'Click here to add new item' 

Enter the name, select the business unit, enter a margin factor, rouding and padding if you require it

Then click save.