In late December 2015, Bob Mapp suspects that he is in a 28 percent tax bracket. In prior years he was in the 15 percent tax bracket. After reviewing Bob's figures, you determine on December 15, 2015, that Bob is over the 15 percent threshold by $3,000. Additionally, you know that Bob has made some bad stock investments this year, he is significantly below his pledge to the Piedmont Baptist Church, and you know the state in which Bob lives has a state income tax system.

Suggest ways for Bob to drop back into the 15 percent tax bracket.