13. If national income is 1,200 consumption is 600 taxes are 200 and government purchases are 300 then national sfying is a. 300. b 400 C. 500 d. 600

To calculate national saving, we need to use the following formula:<br /><br />National Saving = National Income - Consumption - Taxes - Government Purchases<br /><br />Given:<br />National Income = $1,200<br />Consumption = $600<br />Taxes = $200<br />Government Purchases = $300<br /><br />Substituting the values into the formula:<br /><br />National Saving = $1,200 - $600 - $200 - $300<br />National Saving = $400<br /><br />Therefore, the correct answer is:<br />b. $400