My car is due for a smog test but the check engine light is on.

What is your question?

The mechanic did a code diagnostic and he said the EGR valve needs to be replaced and one of the cylinder is clogged and will need to be cleaned and will also do a tune up. He is charging me $350.00 to replace the EGR valve and $250.00 to clean the clogged cylinder which includes tune up. The total cost is $600.00. Is this a reasonable price?