The Country of Econoville Has Created a Negative Income Tax

The country of Econoville has created a negative income tax for its residents.Tax liability in the country is determined by the following equation:
Taxes owed = (20% of income) - $7,500
If Olivia's income is $60,000,what is her total tax owed (a positive number) or tax credit (a negative number) ?

A) - $16,500
B) - $12,000
C) $4,500
D) $12,000
E) $16,500