I should think that would cover at least 2 bottles of wine for a slave. 25 pounds for one bottle = excessive luxury reserved for alphas. I never buy anything over $11.99, personally ;).
I'm with you Denied. There are some great wines available for about £8.00, about $10.50. In continental Europe the price is even better, about $6 for a brilliant red or white. Brexit fucked me over!