Do they allow tents overnight on sand area? If so, what are the prices?

Campsites #36, #37, and #38 are tent only and right on the edge of the beach. Literally from the campsite, walk down the ice plants onto the beach. The sites have an unobstructed view of the beach. My default one is #37. Photo from #37: https://goo.gl/maps/o3EnnTg1ZYw $35 plus $7.99 non-refundable fee.

There are some tent spots that are just off the beach, I can't remember tent prices though

No tents allowed on the beach overnight. There are a few spaces that are tent only; approximately 500 ft from their designated parking for those spaces. Check www.Reservecalifornia.com for availability and pricing.

I think they have area for tent As reguard to price I think it is posted On web