Numbers - Force A Calculation Result If Less Than Zero To Equal Zero?

I've a very simple situation, which of course I can overcome with logic, but is there a built in VB function to ensure the following:

Dim price
Dim subsidy
if price - subsidy <= 0 then
price = 0
end if

In practical terms, I've lots of other things going on to calculate price, so I want to simplify this to:

Dim price = calculatedPrice - subsidy

and wrap that into some VB formating that ensures if price ever becomes negative it's forced to zero.

I'm thinking that a simple "Type" conversion might do it, but am not sure which type would suit.