Each box costs $80 + $165 = $<<80+165=245>>245
They spent $245/box x 400 boxes = $98,000 on 400 boxes.
They were given another $98,000 x 4 = $<<98000*4=392000>>392,000
They are able to pack another $392,000/$245/box = 1600 boxes
Altogether, they pack 1600 boxes + 400 boxes = <<1600+400=2000>>2000 boxes.
#### 2000