What am I doing wrong?

I can't subtract from the global variable?

dropbox.com/s/yf0o9w1qfshwviy/Shop.capx

Just remove "" and use syntax instead of spacing~

For example:

if on clicked & Price <= "Money"

Subtract "SpeedIncrease Price" from Money~

Change to:

if on clicked & Price <= Money

Subtract SpeedIncrease.Price from Money~

"" is for String~

If you add it, the value will become String~

Hope it help~

Thank you!!!