Write program calculator (OEE) for machine cut

I am working on a project of calculating the overall performance of a processing machine called (OEE), I write a WPF software c # create a form to enter data and program the formula to self-output in textblock. recipe : OEE = A * P * Q

A = production time - total downtime = run time (A)

P = Theoretical Cycle time * run time = The theoretical output (P) compares with the actual Output with the ratio of%

but the theoretical cycle time is how much detail is the data taken on a 5-minute machine (but here I just need to enter the estimated direct value to simulate)

All of the above indicators are percentages and time converted to minutes for easy calculation. It sounds easy to tangle but can you help me a little bit please !!![enter image description here][1]