$[$LO $2]$ Joss Distributors had the following revenue$-$related

$$26,500$

transaction during December:

Collected cash for services provided in November, $$12,000$

Provided services on account, $$24,500,$ of which Joss collected $$14,000$

Received $$2,000$ on December $1$ for services to be provided evenly in December and January.

According to the revenue recognition principle, how much revenue should Joss record for December?

IDON'T KNOW YET