The Pro's will accommodate that size easily as many others being that narrow. Would need more details on window and install to comment on price.
22 by 60 is modest size in most cases and the Pro should work just fine in that application.
Assuming the installation is a standard wood out (pull the stop, set new unit, cap, etc), that pricing seems fair.
If the home is older than 1978 or has lead paint, that pricing is more than fair. Same for any wood rot that is covered in that pricing.