Answer:
$833
Explanation:
As per accrual basis of accounting, an income is recognized when it is earned and not when cash is received for it.
In the given case, customer purchased a service for 3 months.
The position as on 31st Dec is that only one third i.e 1 month of services out of 3 months has been provided and 2 months of services is due which is yet to be provided against the collective cash received.
Hence, the spa should recognize 2500/3 i.e $833 in revenue on it's December 31st, 2022 financial statements.