rocker cover gasket problem

Dear guys

I am going to have a 197 R27, but found a common problem
Oil leakage from top left , sound like have to replace the rocker cover gasket

May I know how much for the parts and labor in general ?
and could it fixed by DIY?
Thank you so much for help!

Cheers
 
Is the leak on top or is it round the sides? If it's on top it's a very simple fix. You just need to remove the bolt that the oil is around, apply a small amount of sealant and then screw the bolt back in.
 
As deadmau5 said, I had this problem on mine but sealed up the bolt hole and the problem has gone.