how many euros spending money will i need for a week in spain?

in 2 weeks im going on holiday to spain, im going with my friend, her parents have a villa so i only needed to pay for flights.

i was wondering how many euros would i need to take? my friend said i dont need to buy food or drinks as her parents will pay but said we will only pay for our own if we go out on our own.

im not even planning on paying for activities, we dont really drink alchol much and not really wanting to buy anything apart from maybe a souvineer or 2, i was thinking of taking 100 or 150 euros? would that be enough? its only really for food if im out with my friend on our own and snacks and drinks like cola and juice.