One jar had 80 and the second jar had twice that amount so 2*80 = 160 marbles
The third jar had 1/4 of the first jar's 80 marbles so it had .25*80 = <<1/4*80=20>>20 marbles
When you add up all the jars, she had 80+160+20 = <<80+160+20=260>>260 marbles
#### 260