To spend it would effectively be to steal from the store.
Sorry, I know the bonus would be nice, but you didn't earn it.
Do stores operate ethically and thereby require reciprocal respect from customers?
Coles/Safeway (for example) steal from farmers to give to CEOs/shareholders.
Does the $60 even mean anything to the store?
What do you have to do to 'earn' something - for example, the CEO of a company might make 1000x the annual wage of the factory floor worker; that doesn't mean the CEO 'earned' it, it just means that he is unequally rewarded by an unjust and arbitrary system.
Enjoy the $60 bonus. I see utterly not practical ethical reason why you have any moral obligation whatsoever to give even a millisecond of care about the poor old major corporation whose $60 you are 'stealing'.
If you had any way of giving it to the individual who used to live there, then I would say you were stealing if you didn't. The corporation doesn't get a vote in my personal moral compass.