"DerbyDad03" wrote in message

Not as hard to say as you think. Reread the OP's post. "I bought the
faucet online and Mom called a plumbing company to install it."

read this part
Parts and labor are not broken out but the invoice says $336.00 for the
faucet installation and $146.00 for the shutoff valve installation.

If the labor was $336, yes it sure seems high.