In the Dynamics tutorial there is a section on determining desired acceleration. The instruction is to add together the horizontal-plane acceleration with the results of the incline calculation.

On the RMF Calculator, there is an entry for Desired Acceleration, and further down an entry for Angle of Incline.

My question: What value should be entered for the Desired Acceleration? The horizontal-plane acceleration (because the calculator uses the entered incline angle data to do the calculation and sum for you); or the calculated value (sum of the incline angle acceleration calculation and the horizontal-plane acceleration)?