I recommend a google spreadsheet that contains the equations and then a series of rows for each upgrade level. If you add a new upgrade row, the values are automatically generated, because they are governed by a formula. If you change a value in the formula, it changes every cell.
You would have to manually copy the formulas to your game code, but a google sheet will make it easy for me to review what you are doing.
I recommend a google spreadsheet that contains the equations and then a series of rows for each upgrade level. If you add a new upgrade row, the values are automatically generated, because they are governed by a formula. If you change a value in the formula, it changes every cell.
You would have to manually copy the formulas to your game code, but a google sheet will make it easy for me to review what you are doing.