其它
One ticket to a mini concert costs $\textbackslash$20$ at full price. Nicole buys $4$ tickets using a coupon that gives her a $25\textbackslash\%$ discount. Bel buys $5$ tickets using a coupon that gives her a $30\textbackslash\%$ discount. How many more dollars does Nicole pay than Bel? 
Overseas Competition->Knowledge Point->Calculation Modules
C 