Final answer:
If sales increase by 30%, the earnings before taxes (and net income) would increase by approximately 8.1%.
Step-by-step explanation:
To calculate the increase in earnings before taxes (and net income) resulting from a 30% increase in sales, we need to apply the profit margin to the increase in sales.
The profit margin is calculated by dividing the earnings before taxes by the sales. In this case, the profit margin is
$13,671,000 / $50,439,375 = 0.27, or 27%.
So, if sales increase by 30%, the earnings before taxes (and net income) would increase by 30% multiplied by the profit margin of 27%, which equals an increase of 8.1%.
Therefore, the earnings before taxes (and net income) would increase by approximately 8.1%.