The sum of the lengths that are less than the feet given in their case will be 6.69 feet.
Your information is incomplete as the values aren't given. Therefore, assumed lengths will be given in this scenario.
Let's assume that the lengths of the boards that are less than 4 feet long include 3.4 feet, 1.2 feet, and 2.09 feet.
In this case, you'll add the sum together. This will be:
= 3.4 + 1.2 + 2.09
= 6.69 feet
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