Macro - Copy and Paste to a Specific Row based on the input in a cell

I am trying to write a macro that will copy and paste a formula to a specific row based upon my input in a certain cell. Therefore, one time I might need to have the macro copy and paste to row 25 and the next time the macro might be required to paste the formula to row 50. I have attached the file including the basic macro. Any help would be greatly appreciated. Thank you.