On Mon, 21 Sep 2009 23:13:57 -0600, "SteveB"
wrote:

BTW, one tenth of $350 is $35, and if the OP is happy with that, why do you
require a detailed explanation?


The concern (as expressed by others here) is that the contractor comes
back later, says "look, see, it's all done!" and asks/sues for the
full $350, or says "okay, you have receipts for for $35, so I'm
entitled to $350-$35=$315".

I agree with others that say send a letter giving a deadline, after
which the OP is willing to consider the job closed for the amounts
already paid, with the $350 considered "liquidated damages". Giving
the contractor one last chance to come back or at least object to this
arrangement will be useful if he tries to collect laer.

Josh