At the end of the tax year the Tax Office sent an inspector to audit the books of a synagogue.

While he was checking the books he turned to the Rabbi and said, "I notice you buy a lot of candles. What do you do with the candle drippings?"

"Good question," noted the Rabbi. "We save them up and send them back to the candle makers, and every now and then they send us a free box of candles".

"Oh," replied the auditor, somewhat disappointed that his unusual question had a practical answer. But on he went, in his obnoxious way: "What about all these matzo purchases? What do you do with the crumbs?"

"Ah, yes," replied the Rabbi, realizing that the inspector was trying to trap him with an unanswerable question. "We collect them and send them back to the manufacturers, and every now and hen they send a free box of matzo balls".

"I see," replied the auditor, think hard about how he could fluster the know-it-all Rabbi. "Well, Rabbi...," he began when the Rabbi interrupted him, "just before you ask what we do with all the leftover foreskins from the circumcisions we perform, here, too we do not waste, what we do is save up all the foreskins and send them to the Tax Office, and about once a year they send us a complete Dick."