in column a we have number 1, 3, 7, 12, 15 and in B respectively 10, 20, 30, 40 ,50. what I need is to be able to look up a decimal number like 2.1 that will return from A the number closest above and closest below its value, and its respective number in B. In this example it would return 1 & 10 then 3 & 20.
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