By Dave Burke Cowardly Tories have voted to keep the cost of the Rwanda deportation scheme secret – with Rishi Sunak accused of looking like a “dodgy salesman PM”. In a scathing broadside, Labour’s Shadow Home Secretary Yvette Cooper urged ministers to finally set the record straight over claims they’ve promised £400million to the African nation. On top of this, she estimated it could cost taxpayers an extra £200,000 for every person sent there. Facing MPs in the Commons, Migration Minister Tom Pursglove refused to contradict the figures. Ms Cooper told him: “Taxpayers have a right to know how…