d_price={'A1':2,'A2':3,'A3':4,'A4':5,'A5':8,'A6':6} d_qty={'A1':0,'A2':0,'A3':0,'A4':0,'A5':0,'A6':0} box={10:0,5:0,2:0,1:0} balance=0 def return_money(balance): q10,q5,q2,q1=0,0,0,0 while balance>0: if balance>=10 and box[10]>=1: balance-=10 q10+=1 ...