So first step is to find out how much the woman's salary is in 1989. We can do this by multiplying 0.15 (15% in decimal form) and $2,800 together, then adding that product by $2,800.
The woman makes $3,220 in 1989.
To find how much tax she pays in 1989, just multiply 0.125 (12.5% in decimal form) and 3220 together:
In short, the woman paid $402.50 in tax in 1989.