If the company wishes to increase its total dollar contribution margin by 30% in 2020, by how much will it need to increase its sales if selling price per unit, variable price per unit and total fixed costs remain constant? Total increase in sales required: $ Sunland Bucket Co. a manufacturer of rain barrels, had the following data for 2019. Sales Sales price Variable costs Fixed costs 2.850 units $60 per unit $42 per unit $17.955