No idea. More than some, but way less than others.
I don't buy either as a matter of routine as I'm not rich enough for that, so I take my own lunch to work most days and often take food and drink out with me.
I do eat out a couple of times a month with DP and have a couple of nice lunches out by myself a month too (I don't like and resent paying for a lot of ready made lunch options so I'd rather pay for an occasional sit down cooked meal than daily sandwiches and pasties).
I'm not a coffee person, so if I fancy a hot drink while out and about I'll go to McDonald's or Greggs because I'm too tight to pay 'coffee shop' prices and hate the experience - too slow and full of annoying people.
But what I spend is irrelevant to you, everyone has different budgets and priorities and what's affordable to one person could be a huge dent in another's budget given that regular spending on coffee and eating out can add up significantly and other costs eg bills, debt repayment, mortgage deposit saving, home improvements, new car etc etc should usually be a higher priority.
Even a relatively small daily spend eg £10 each working day is £200 pm, nearly £2500 per year or over £30k per decade once interest is taken into account and many people spend more than that and then wonder why they can't afford other things.