It varies around the country dramatically! Where are you?
Here in East Yorkshire, our yard full livery is £100pw inc feed, hay and straw, catch in turnout, rugs, basic grooming etc.
Basically everything for your horse is catered for except the exercise which the owners do as and when they please.
Some only come a couple of times (week days) then on the weekends. Others are down most days. Personal choice, and work commitments generally play a large part how often they see them!
Interesting jenz87 as full livery down south includes exercise up to 6 days a week. The service your providing is classified as Part livery down here. Full livery is around £150-190pw in Surrey
Mines £90 p/w (in south Yorkshire), is same as jenz, includes everything apart from exercise, I will exercise as an extra though charging £8 an hour. My part livery is the same but only mon-fri (DIY at weekends)
I am in South Herts and pay just under £140 per week for full livery - includes:
muck out
shavings
standard hard feed if wanted
unlimited haylage
grooming
tack cleaning
plaiting
clipping
exercise if owner not riding
rug changes
catch in / turn out
unlimited tea sympathy and support if needed
I am I guess on part livery in Essex, it is £440 a month and includes:
unlimited straw bedding
unlimited hay
hard feed
turnout, bring in, rug change, pick out feet etc.
all mucking out/feeding etc.
twice daily poo picking
hold for farrier, vet etc.
all year turnout
20x40 floodlit arena
good hacking
I work full time in London (1-1 1/2 hr commute each way) and I go up and ride 5-6 times a week.