Advent of Code Q7 Pt 2

[jorjun_arch]

    import
      strutils,
      sequtils,
      sugar
    
    const
      loadData = (path: string) => readFile(path).split(",").mapIt 
strip(it).parseInt
      crabX = loadData("./day7/data.dat")
      cost = (num: int) => (num * (num + 1)) div 2
      fuel = (b: int) => crabX.mapIt(cost(abs(it - b))).foldl(a+b)
    
    var
      best = 0
      used = 0
    
    for ix, _ in crabX:
      used = fuel(ix)
      best = if used < best or ix == 0: used else: best
    
    echo best
    
    
    
    Run

My Deno version gives: 92748139 but the above Nim gives me 92948968 What did I 
do wrong plz?