Changes in Variable Cost and Selling Price per Unit
The contribution sales ratio is affected by any change in variable cost or selling price per unit. This ratio is a measure of the rate at which profit is being earned and its size demonstrated via the steepness of the slope of the profit volume graph
Line xy displayed the existing profit curve for a company
Fixed costs = OY
The profit at sales volume OS = SX;
Break-even point happens at point B and the margin of safety = M
A rise in selling price and/or a falls in variable cost per unit will rises the contribution; sales ratio resulting in a new point curve yx
A falls in selling price and/or increase in variable cost per unit will decrease contribution; sales ratio resulting in a new profit curve yx2.