Car seats

Ok here's the scoop. The car seat laws state that to be in a booster seat a child's shoulders must be above the top strap hole in their car seat and be 40 pounds...here's the dilemma Bentley is huge! His shoulders are way above that point and he uncomfortable in his car seat however he only weighs 28 pounds. Any ideas on what I should do?

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5sarah New Bern, North Carolina
    10/02/14
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    10/02/14
    5sarah
    No the straps just go up by holes.
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      10/02/14
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      10/02/14
      5sarah
      Yeah they're all like 140 bucks which is something that's just not possible right now
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        10/02/14
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        10/02/14
        5sarah
        40
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          10/02/14
          Comment deleted
          10/02/14
          5sarah
          Cosco rear and forward facing
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          About sarah
          Born: Westfield, New York
          Current: New Bern, North Carolina
          Birth: April 30
          On Moms.com since: Oct 30, 2013
          I am 21 and have one child of my own plus my step kids.