Bought for, when I couldn't afford
But couldn't afford to leave the scene
Cause this mission here we couldn't abort

from Lupe Fiasco – Dedicated Lyrics on Rap Genius

Meaning

when he was down to his last dime, she would spend the cash necessary,(using the double meaning of afford) as well as buying supplies he needed when under surveillance(i assume the mission was maybe slangin', the scene being the kitchen or lab).

To help improve the meaning of these lyrics, visit “Dedicated” by Lupe Fiasco Lyrics and leave a comment on the lyrics box