Referring to the post in General Question

Does anyone have any suggestion on following case?

There is a list of numbers under colume A
1813, 1748, 1652, 1415, 1361, 1169, 1129
945, 890, 765, 633, 604, 598, 525, 490

A range 300 is defined each number's upper and lower limit, such as the
number 945, upper limit is 945 + 300 = 1245, lower limit is 945 - 300 = 645.
Within the defined limits between 1245 and 645 for the number 945, which
cross above the number 1169 & 1129 and cross below the number 890 & 765, this
defined range for 945 covers 4 values within those upper and lower limits,
then it returns the value 4 in colume B.
I would like to perform this calculation for each number.
Does anyone have any suggestion on how to do it in Excel?
Thank you for any suggestion
Eric