A caterer normally charges \(\$15\) per person plus a \(\$10\) delivery fee for 'in-advance' orders but charges \(\$20\) per person plus a rush delivery fee for same-day orders. If Amy places a same-day order for her company, by what percent is her total cost greater than if she had placed the same order 'in advance'?

1. The rush delivery fee is \(\$20\)

2. Amy places an order for \(10\) people

The OA is C