300Mb/s Fibre for $55/mo total after Tax?

I am looking to "cut the cord" on Xfinity and am doing price comparisons and looking at going with AT&T's $55/mo internet only deal and wanted to know how much the total bill comes to after all the taxes and fees to to do a proper comparison (as the bottom line for my Xfinity bill literally adds 45% on top of basic charges).

I live in the SF bay area if that makes a difference.

Thanks!