"The deputy minister is the numbers' person. We need to understand what we are dealing with...and have it confirmed," she said.
Zimbabwe is in the throes of its worst economic crisis since independence from Britain in 1980, blamed on mismanagement by Mugabe's government. Mugabe denies the charges and accuses his domestic and international opponents of sabotaging the once prosperous country.
The economic crisis has deepened since the controversial March 31 parliamentary elections which gave Mugabe's ruling ZANU-PF party a two-thirds majority amid opposition charges of vote rigging.
Zimbabwe's petrol pumps have virtually run dry in recent weeks and the former regional bread basket has had to import 1.8 million tonnes of the staple maize crop after a late season drought destroyed most of its crop.