Production Economics (ProdEc) ProdEc is a tool for managing production in terms of economics and for evaluation of production and marketing strategies. Get help with preparation of next years corporate budget, Use prime costing for determining a recommended price for a new product and marginal costing for arriving at the unit contribution and profit to volume ratio for a product. Formulate and evaluate strategies for production and marketing channels to maximize profit to volume ratio for a mix of products. On screen manual. Requires Windows 3.x. Price for single copy US$ 105, including packaging and air mail shipment.