Use with condition

I want the make average calculator.
I need field of the grade and field of number that is the level of the subject, when high level give bonus so I need to use if condition to check the level.

Can I add if condition to check this?

For example is the grade is 100 and the level is 5 the grade get bonus of 25 and become 125, but is the grade is less than there is no bonus.

https://wordpress.org/plugins/calculated-fields-form/