It all adds up?

Following devaluation industrialists are urged to take advantage of the great opportunities facing them, but it is not always clear what these opportunities are in financial terms. Such difficulties apply particularly to a company which imports as well as exports and has based its price policy on anticipated volume of sales on a home market and its costs on a smaller annual rate of increase than now seems likely. Do two and two equal four in the complex arithmetic of devaluation? Not necessarily, as the following case of Barsok Brushes Ltd. (BBL) demonstrates. Although its scale of activities has been reduced to simplify discussion the question for consideration remains the same.