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<?php function horrible_excel_op($f, $g) { $tiers = [ [19.5, 2500], [18.5, 1875], [17.5, 1675], [16.5, 1550], [15.5, 1250], [14.5, 1125], [13.5, 925], [12.5, 800], [11.5, 725], [10.5, 650], [9.5, 575], [8.5, 475], [7.5, 375], [6.5, 325], [5.5, 250], [4.5, 225], [3.5, 150], [2.5, 100], [1.5, 75], ]; $defaultMultiplier = 50; foreach ($tiers as [$threshold, $multiplier]) { if ($f > $threshold) { return $g * $multiplier; } } return $g * $defaultMultiplier; } var_dump(horrible_excel_op(2.6374, 18));