The price per night before booking was $69 ( in the screen with red ‘book’ bar, it had correct calculation, $69 per night x 4 $276) . After booking, the receipt showed a different rate
$85 per night x4 $340.
The host sent me the copy of their receipt, which shows $69 per night x 4 $340.
It is an incorrect calculation, $69 x 4 = $ 276.
Of course, there are separate lines for cleaning fees and service charges.
I have been communicating with Airbnb customer service person for two days. But she thinks probably that change is due to additional tax, but could not tell me for sure.