I must have had a brain fart. Missed this part of your post.

LESSEE'S HOLD OVER. If Lessee remains in possession of the Premises with the consent of Lessor after the natural expiration of this Agreement, a new tenancy from month-to-month shall be created between Lessor and Lessee which shall be subject to all of the terms and conditions hereof except that rent shall then be due and owing at (same rent as above) per month and except that such tenancy shall be terminable upon sixty (60) days written noticed served by either party.
That's what I was referring to.

You were bound by 60 days notice. You owe him a month's rent.

He forfeited the deposit.

How much is the deposit?

How much is one month's rent?