'Print the BoxUsage and approximate costs of all requests made on
this specific SDBConnection instance.
.. tip:: This can be out of date, and should only be treated as a
rough estimate. Also note that this estimate only applies to the
requests made on this specific connection instance. It is by
no means an account-wide estimate.'

def print_usage(self):

    print ('Total    Usage:    %f    compute    seconds' % self.box_usage)
    cost = (self.box_usage * 0.14)
    print ('Approximate    Cost:    $%f' % cost)
