Help advice needed ...

[Tsiappourdhi]

What is the term called when renting for example a sandwich shop ? I.E. paying rent to use the trade of selling sandwiches? and also if i know the weekly takings how can I work out if the rent set is fair? WHat things do I need to take into account?

[buildersmate]

You are asking basic Business Planning questions here.
Your gross income is the money from the product (sandwiches). You then need to estimate how much you will spend on raw material ingredients and any staff you intend to employ. Don't forget that you have to pay Employers' NI contributions as well as their pay costs. That gives you your gross profit. Then you need to assess your fixed costs. These will include rent (which you mentioned), business rates, insurance, utility bills (which you didn't mention). Take away your fixed costs from your gross profit gives you your income - namely what left for you as the owners' salary.
Only by assessing all of these aspects can you hope to work out how much you could afford on the rent.

[CheekyChops]

The amount of rent you pay has nothing to do with your weekly takings, it is more to do with location, size of premises etc.

For example you would pay more rent on a shop in a prime location on a busy high street than you would for one in the middle of nowhere, even if your takings were the same.