Suppose the national debt is $80 trillion and the government spends $800 billion during the fiscal year on goods and services. In addition, the government collects tax revenues of $600 billion and makes transfer payment equal to $300 billion. Assume the economy is producing at the potential or full employment output level. The budget balance for this economy is equal to ______billion and the national debt is $____. trillion.

Question

Suppose the national debt is $80 trillion and the government spends $800 billion during the fiscal year on goods and services. In addition, the government collects tax revenues of $600 billion and makes transfer payment equal to $300 billion. Assume the economy is producing at the potential or full employment output level. The budget balance for this economy is equal to ______billion and the national debt is $____.  trillion.

The budget balance is equal to (600-800-300=-500) but I can't figure out to get the national debt $?