 <translate> Dexter have 9 x 15 = 135 basketball cards. He filled 9 - 3 = 6 plastic boxes with football cards. So, he has 6 x 20 = 120 football cards. Therefore, Dexter has 135 + 120 = 255 cards in total. The final answer: 255. <yor> Dexter ní 9 x 15 = 135 káàdì bọ́ọ̀lù agbábọ́ọ̀lù. Ó fi káàdì bọ́ọ̀lù kún páálí oníke mẹ́fà. Nítorí náà, ó ní 6 x 20 = 120 káàdì bọ́ọ̀lù. Nítorí náà, Dexter ní 135 + 120 = 255 káàdì lapapọ. Ìdáhùn tí wọ́n fún un níkẹyìn ni pé: 255. 