I have set up the calculation program for the program, but now the problem is that I want to integrate the two classes together but it still is not compatible so you can help me! Textblock caculator not show Only one class can be implemented! code see here :

https://pastebin.com/AnKXHgvg?fbclid=IwAR3pEa1RjQrrvMNTq8wTfZNvmAwBJJehwf\_6UoFK7h96lKSmpOZiatPGB9M

https://pastebin.com/qzPDwvzJ?fbclid=IwAR3dP3Ef3Lo2SSmk9sSLOzrCxy0tZC5Hczpl76SX8TmzdX2cFfr1RmWayhI

sql data : https://i.stack.imgur.com/pCgiK.png[^]

https://www.upsieutoc.com/image/FSfuXK

I have a small program, because I'm new, my program is to bring data from sql sever to textbox via combobox option and use the value shown in that textbox to calculate the + I have made it to the step of putting up the data, now thanks to you to help me with the value calculation in the textbox, thank you for your help.

xaml code :

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]