How to string together multiple if functions in a CRM formula field?

How to string together multiple if functions in a CRM formula field?

I am trying to base my cost multiplier on which manufacturer the product is coming from. Here is the function I am using. 

If(${Products.Manufacturer}=='U.S. Cabinet Depot',.23,if(${Products.Manufacturer}=='Impress',.22,1))

Is this possible in a Zoho function field? What am I doing wrong?