I'm building a spreadsheet to use for my own flight planning purposes. One
thing I have to calculate is landing distance which is based on two
variables, temperature and altitude. Below is a table that comes from the
plane manual: first column is airport elevation in thousands of feet, the
other three columns are landing distances in feet for 10, 20, and 30 degrees
Celsius.

Alt. 10 C 20 C 30 C
000 695 755 810
1000 765 825 890
2000 840 910 980
3000 925 1000 1080
4000 1020 1100 1190
5000 1125 1215 1315
6000 1245 1345 1455
7000 1375 1490 1615
8000 1525 1655 1795

Basic Question: How in Excel, would I enter an expression that takes the
altitude and current temperature input by me and look up the corresponding
landing distance? In looking through the posts, it looks like an Index,
Match, Match scenario, but I can't get it to work correctly.

Advanced Question: How could I get Excel to interpolate data based on
variables that aren't strictly listed in the table. For example, the airport
elevation is 1134 feet with a temperature of 13 degrees?

Any help with this would be greatly appreciated.

Alan