Abigail collected 2*48 = <<2*48=96>>96 cookies.
There are 48/4 = <<48/4=12>>12 cookies in a quarter of a box.
Grayson collected 12*3 = <<12*3=36>>36 cookies.
Olivia collected 48*3 = <<48*3=144>>144 cookies.
In total they collected 96+36+144 = <<96+36+144=276>>276 cookies.
#### 276