Contrary to popular opinion, accountants aren't generally qualified to value businesses.
You can appoint a qualified valuer, and I can recommend one or two, but I would not advise it for a "small business". Just pick a number out of thin air and you're good to go. Why do you need a valuation anyway, is it to buy the business?
The valuation provided by the business is based on assets + profit x PE value.
I've no idea what that's about but it sounds like someone's making it up as they go along.

While it may have accounting terms in it, that's a bunch of gobbledegook!
What are these "assets" you mention? Is that book value or market value or fire sale value? And why are we talking assets rather than net assets (ie what about the liabilities)? And are they tangible assets or fluffy nonsense like goodwill?
What is this "profit" you mention? Is it EBIT, EBITDA? Is it after paying the owner a salary for the time spent running the business? Who audited the accounts to verify these "profits"?
And what do you mean by PE value? PE values based on what - listed companies in this sector? If not listed companies where did you get your comparative valuation P/E data from? And who told you that you multiply profits
+ assets by whatever multiple you're using.