Average and Median Earnings. As of 2011, electricians earned an average of $52,910 per year, according to the Bureau of Labor Statistics. The average hourly pay for an electrician was estimated to be $25.44.The median annual income of electricians in the United States was $49,320, and the median-earning 50 percent of electricians made between $37,570 and $65,260 a year.s of 2011, the highest-paid electricians were those who taught at business schools. These workers earned an average of $79,250 a year. Most electricians worked as building equipment contractors, earning an average annual income of $52,600.
The contribution margin, sometimes used as a ratio, is the difference between a company's total sales revenue and variable costs. In other words, the contribution margin equals the amount that sales exceed variable costs. This is the sales amount that can be used to, or contributed to, pay off fixed costs.
In this example the contribution margin per unit is $14 (the selling price of $20 minus the variable manufacturing costs of $4 and variable SG&A expenses of $2). Hence, the contribution margin ratio is 70% (the contribution margin per unit of $14 divided by the selling price of $20). This contribution margin ratio tells us that 70% of the sales, revenues, or selling price is available to cover the $31,000 of monthly fixed costs and fixed expenses.