Polye claims the back log is about K2 billion.
He has queried Mr Marape whether the government had any corrective measures to ease the bottleneck to continuously spin the wheels of the business activities in the country.
His final question was why the local currency was continuing to devalue against the US dollar since 2013.
In response Marape said the trade (export and import) cover would be K5.7 billion at the end of this year.