https://www.reddit.com/r/eastside/comments/vz5nnx/how_much_did_it_cost_you_to_install_ac/
While I don't have real-time pricing information, a quote of $14,000 for a 2750 sqft home including both the AC and furnace could be reasonable.

https://www.bankrate.com/homeownership/how-much-to-install-central-air/
Ah, the refreshing cool of air conditioning in the scorching days of summer. - Central air installation costs an average of $5,861; the typical ...

https://www.nerdwallet.com/article/mortgages/cost-to-install-central-air
Central air conditioner unit: $2,500 to $4,500. This is the most popular choice for homeowners, and, while expensive, can be a very effective ...