what can l do to fix it and how much would it cost me? Thanks!

You have little chance of fixing that hole.
Save up and get a new one, otherwise it wwill just break again, have a good day! =D

take it in to a surf shack. they would know!

l would go to the surf shop, they can probalbly fix it depending on where it is. my quess in price depends on the shop, 100-200 dollar. if its an old board shes right you may just wont to get a new one!
good luck

When u say 'old surf board'' my ears go up. How old? l guess ten years could be old by ur standards, but l am really interested in the 30/40 year old range. l rode an early '70s twin fin into the early '90s. Let me know what u have, l might want to buy it!
That ding should only be around $100 (US) fix, depending on how much water damage has occurred to the surrounding foam. Go to a good local surf shop. They will have a ding Man who can do right by you, if u want to keep the board. If u do not have any experience with ding repair, do not waste ur time & money with anything like 'sun cure', it is not meant for a ding that size.

Way too much money around here if some guy say it can not be done or use the local surf shop,buy a new board..Have a look at what these guys have to say..And you make up your mind from there

http://surfingvancouverisland.com/surf/ding.htm
http://suite101.com/article.cfm/surfing/41924