Leading Brazilian retailer Pao de Acucar has threatened to stop dealing with suppliers seeking what it terms 'unreasonable' price increases. The country is struggling with a 40% currency depreciation which has sent raw material costs soaring, reported the Financial Times. The chain intimated it was considering some pretty aggressive tactics to make consumers aware of the problems it was having, for example by labelling empty shelves: "Say no to this product. It is not available because we did not accept the supplier's price increase. Please choose a similar product."