The sales manager of a supermarket has proposed a marketing promotion of selling a pack of shampoo with a free bottle of hair-conditioner. This is termed as a ‘buy-one-get-one-free’ offer. The retail price (i.e. inclusive of value added tax (VAT)) of the items is as below: In January 2015, the supermarket sold 2,000 of the offer packs. What is the amount of value added tax (VAT) charged on the sale of the 2,000 offer packs?