Mr Huang realized that the other part of the profitequation is revenue.
黄先生认识到收入是利润等式的另一个参数。
2
The second equation tells us that the difference between contribution and fixed costs is profit or loss.
第二个等式告诉我们, 边际贡献和固定成本之间的差额就是利润或亏损。
3
The former is called the graded mine rent and the latter absolute mine rent and they are the excess profit obtained by the equation of existing income value.