I noticed work unit HST1_ 300582_ 000097_ AC0017_ T300_ F00097_ S00002_ 1-- completed and is valid. In executing this task, I claimed 507.9 credits, and my partner claimed 593.6. We were awarded 532.2 credits each. Now if one adds my claimed credit to my partner's, I get 1101.5. But together, our credits add up to only 1064.4. Where did the 37.1 credits go? Is there a service charge for calculating credits? Is my little calculator broken?