Q: I booked a cabin on a cruise that was advertised for $700, but when my agency billed me, the cost was $850. When I asked, I was told that because I’d be alone in the cabin, I had to pay a single supplement. Just because I’m single, why should I have to pay that extra charge?

Frieda M., Queens NY

Q: We’re taking our twin four-year-old grandkids to Walt Disney World later this month. My spouse says he’s looking forward to doing it, but doesn’t think he can handle all the walking and chasing of those very active little boys. He doesn’t want a wheelchair, but would like a scooter so he can get around independently. Are they available at WDW?

Q: I have an embarrassing problem. I haven’t flown for years for one reason. I weigh more than 300 pounds, and I fear the airlines will give me grief. The last time I flew was in 2003, and the guy next to me put up such a fuss about my crowding him, the flight attendant moved him to another seat. That was bad enough, but all the other passengers laughed at me.

I’ve been invited to a family wedding on the West Coast. I’d like to go, but I don’t want to be the laughing stock while being stuffed into one of those very narrow airline seats. What should I do?

Submitted by Jayne R., Trenton NJ

A: Just the other day, a very heavy guy flew from Chicago to Vegas on Southwest. When he tried to board the return flight, he was turnd down because of his weight. We don’t know why he was accepted one way, then rejected. Maybe he was allowed to board for the return flight if he was willing to pay for two seats.

In your case, that may be the solution, or you may need to fly first class where the seats are roomier. If you want to go to the family wedding, do your best to make it happen. Before you buy your ticket, call several airlines and ask about their policies on overweight passengers.

Q: We’re flying to Italy next month, and we’re concerned about exchanging dollars for euros. Some say to wait until we arrive in Italy to get the best rate on euros. And, is it OK to use a debit card at an ATM machine in Italy, and how do we get the best exchange rate?