zing is fine, but the issue is that you can't now, with pages flying off in front of you...""...and if they fly away, you can pick them up again..."Only then did Xiao Ya realize that he was still fixi...r_of Notebooks, number_of Pens): cost_per_Notebook = 3 cost_per_Pen = 5 total_cost = (number_of Notebooks * cost_per_Notebook) (number_of Pens * cost_per_Pen) return total_costpr...