Percentage of monthly salary that Maria spent on gifts to her friends every month = 6.5%
Amount of money spent by Maria every month on gifts for her friends = $320
Let us assume the money earned by
Maria every month before buying gifts for her friends = x
Then
6.5% * x = 320
(6.5/100) * x = 320
6.5x = 320 * 100
6.5x = 32000
x = 32000/6.5
= 4923.08 dollars
So Maria earns a total of $4923.08 every month before buying gifts for her friends.