How to reference
or access a cell in another worksheet:
1. If the sheet name is simple like 'income' then you can access the
cells in this worksheet
by writing =income!CellAddress
2. If the worksheet name consisits of multiple words with spaces like
'Profit And Loss' then you must enclose the name in single quotes like
'Profit And Tax' followed by an exclamation mark and then the cell
address ='Profit And Loss'!CellAddress to access the cell.