text: how do you calculate gross earnings? hi. first, how do you calculate gross earnings when you know the number of units produced and the rate per unit?  2nd. how do you calculate the gross earnings whe nyou know the commission rate and the number of total sales?  please show formulas so i can learn and solve. thank u! gross earnings are earnings before deductions or taxes:  amount earned per unit produced  *  number of units produced  =  gross earnings  dollar amount of each sale  *  total number of sales  *  commission rate  =  gross earnings  ***note that "commission rate" will be a decimal.  if your commission is 10%, plug in 0.1 for commission rate in the formulas.***