In Exhibit 5-9, the price elasticity of supply for good X between points A and E is:

One reason the total sum of the income categories does not equal GDP is that

A) taxes are generally larger than subsidies and the depreciation of capital is negligible. B) GDP values goods and services at retail prices and the income approach values them at wholesale cost. C) people do not spend all their income, so the value of consumption expenditure is less than the value of wages. D) GDP does not include depreciation, which is part of the income categories. E) GDP values goods and services at market prices and the income approach values them at factor cost.

In the table above, if the wage rate is $8.00 per hour, the profit-maximizing number of workers is

A) 1. B) 2. C) 4. D) 5.