Lamps cost 120 wholesale are sold for 192 at a profit of 6 per lamp How many lamps were in the shipment?

To find the number of lamps in the shipment, we can first calculate the profit per lamp. Since the lamps are sold for $192 and the wholesale cost is $120, the profit per lamp is $192 - $120 = $72. However, the problem states that the profit per lamp is $6, indicating that the selling price should be $126 instead. Therefore, the profit of $6 means the total profit for the shipment is $6 multiplied by the number of lamps, so the number of lamps can be calculated as: ( \frac{(192 - 120)}{6} = 12 ) lamps.