How much does it cost to have a lifter replaced? Or tell me what is wrong.

What is your question?

i have recently purchased my 2009 mercury milan. The next day i got a oil change on it and two hours after getting the oil change done my lifter started making a fast paced ticking. and i believe it is because it was run so long on almost no oil what so ever that that is why it is making the noise. please help need to fix very soon. I have checked the oil and their is plenty of it in their not to much and not to little