Rafael and Lucy, married taxpayers, each contribute $4,500 to their respective $ 401(k) plans offered through their employers. The AGI reported on the couple's joint return is $45,000. Determine their credit for retirement plan contributions (the Saver's Credit). Click here to access the "Saver's" Credit Rate and AGI Thresholds Table. As a result, they may claim a credit for their retirement plan contributions of $ X