Any Excel specialists out there?

Have a basic Excel system set up to monitor all accounting for a small hair salon (billings by stylist, by day, by week etc., petty cash, invoices, and auto VAT calculations).

All set up by a previous freelancer (about to go to India) so need someone to come in and take over. Very simple system, mainly replication of existing sheets and formulae.

Can be done remotely, but preference given to south London applicants willing to visit on-site as required.