A radiology firm charges $$2,000$ per exam. A private insurer's allowed fee is $80$ percent of charges. Its beneficiaries pay $25$ percent of the allowed fee. How much does the insurer pay? How much does the beneficiary pay?

The insurer pays $75$ percent of $$1,600,$ or $$1,200.$ The beneficiary pays $$400.$

The beneficiary $25\%$ of $$2,000$ or $$500.$ The insurer pays $75$ percent of $$1,500,$ or $1,125.$

The beneficiary pays $$400.$

There is not enough information to calculate the insurer portion.