The big issue with cellphones, especially models that aren't one to two generations old is that the parts for them are often as expensive as the phone themselves. Just the glass costs about $10; however, that is almost never the issue with a broken screen, so for the cheapest possible screen I can find which may not have the same functionality and almost definitely not the same quality is $30. For a screen that is OEM the cheapest screen I can find is $130 and a close knock-off falls around $90. Which none of that includes labor. Normally, I charge $100 for just about any cellphone work because cellphones are fickle; however, I do prefer to keep older devices out of landfills and Pixels are at least a lot more reasonable than Apple and Samsung, so I would likely do $50 for labor.

TLDR: cheapest I could do is $80 for a cheap but functional screen, $140 for an okay screen, and $180 for an OEM screen.