If Lawrence bought 23 pound of roast beef and he used 34 of it to make a sandwich how much roast beef did Lawrence use for his sandwich.?

Lawrence used 34 pounds of roast beef to make his sandwich. However, since he only bought 23 pounds, it seems there is an error in the question. He could only use up to the amount he purchased, which is 23 pounds. Therefore, he used all 23 pounds of roast beef, not 34.