How to stop counting custom option cost by quantity when showing item in cart.

So currently lets say if you are buying hats for 10$ each, and it has a custom option of adding some pin for 5$ – then if you buy 10 items, in cart it will show:

Hat (10 x custom pin: +50€)___ Price: 15__________ Quantity: 10______Subtotal: 150$
Notice the +50$, which is made by multiplying +5 ten times. But I want it to be instead:

Hat (custom pin: +5€)____ Price: 15__________ Quantity: 10______Subtotal: 150$

Please tell me its a setting somewhere and I dont have to involve a dev 😀