For example, if you figured 2000 square feet, you need 2000 square feet/100 square feet in a square = 20 squares of slate. A simple roof might be all rectangles (Area = length * width). There are often triangular sections to compute (Area = the base * height/ 2).
The average price for connecting flights from New York to Mexico City is $517. The average price for non-stop flights from New York to Mexico City is $440. The chart below shows up to date information regarding non-stop flights from New York to Mexico City.
In winter, you can fly from New York to London for about $400 roundtrip (though, if your lucky, airfare sales wars can cometimes drop that to around $200). In summer, $1,200 would be considered a reasonable price to get from, say, Seattle to Madrid. Here are some specifics: Where from: Flights to Europe are cheapest from the East Coast, especially New York/Newark (with Boston, Philly, and Washington/Baltimore right behind). Next lowest prices tend to come from other mega-hub cities and gateways (Atlanta, Chicago, L.A.).