title: Excel Formula Solution Required
body: <p>I am looking for a solution to the following issue and I just don't have the expertise.
  I have a column of dates and beside that column I have a column of numbers.
  I would like a formula that would add up the numbers until I hit a certain threshold (designated number)
  For example let's just say I have 9 rows in column B all with 100 and beside each number in the column A is a date.  I would like to know which date in column A represents a Number in column B that is equal to or less than 750
  Obviously it will be row 7 but I need the formula.
  Thanks in advance and looking forward to any help.</p>