I agree with you DJ the way the accounts/reports are produced does not reveal the true picture of Ty Pawb.
There should be two separate income and expenditure reports, one for the square metres market area, and one for the square metres arts section area.
The total space of the market area, less the total lettable space in that area, is then divided into the total service charge cost to give a cost per sq metre. This is then recharged to each individual stall through a service charge by the area of their stall. Empty stalls being the responsibility of the landlord.
The present set up does not show the vulnerability of grants (income) to the arts section. If the present occupancy level of around 85% does not cover the market section overheads etc, then somebody is not doing their job properly.