The Matrices feature allows you to set up a different price per product variation. To do so, select matrices from catalog section and create a new item as shown below:
Set up the matrix configuration by defining the variations:
NOTE: Please keep in mind, currently we just support a matrix of size 2 by 2.
Now, you can define a different price per variation and save it as follows:
You can find this item under the matrices section:
Then you can select the desired attributes while adding this item to a document: