gottacruisetoo

Contact your credit card company and ask for an exchange adjustment. Since HAL cancelled and you didn't, they should pay the exchange difference.

I was on the "Best of Lima" excursion on December 1 and it had the same disclaimer. Most people on the tour and in the cathedral on other tours wore some form of sports shoes. I didn't notice anyone being turned away. My husband only wears runners/walking shoes for health/safety reasons and was willing to wait outside if it was a problem. It was not a problem.

I think the 25% is the exchange rate used on converting US$ tips (onboard currency) to CAD funds, assuming you booked in CAD. A bargain at today's actual exchange rate.