After All-Star struggles, RCR must regroupIt's hard to figure out net worth from these forms because they only ask for broad ranges when reporting value of assets and debts. But the Obamas tax day filing had showed they paid $855,323 in taxes on a combined income of $2,656,902.We do know from the forms,though, that Biden got a $9,563 advance last year for the audio version of his memoir, "Promises to Keep,"and a stipend of $20,500 for teaching law at Widener University in Chester, Pa.