This again?
There should be a rule that says you can't rehash the same topic more than once a month...
Check this thread from just a few weeks ago for more discussion and answers on this topic:
Craft rules make no sense at all
Short synopsis: For a more complex item to have the same market price, it has to take less time to make. If it took the same time to make as the less complex item, the crafter would have to put a higher market price on it.
Roughly, Price = DC x Time, so Time = Price / DC

Check this thread from just a few weeks ago for more discussion and answers on this topic:
Craft rules make no sense at all
Short synopsis: For a more complex item to have the same market price, it has to take less time to make. If it took the same time to make as the less complex item, the crafter would have to put a higher market price on it.
Roughly, Price = DC x Time, so Time = Price / DC