fix enrollment logic, add financial aid, fix class distribution

app/Libraries/Tuition/GradeLevelParser.php

@@ -37,4 +37,17 @@ final class GradeLevelParser
 
         return 999;
     }
+
+    public static function isYouth($grade): bool
+    {
+        if (! is_string($grade) && ! is_numeric($grade)) {
+            return false;
+        }
+
+        $value = strtoupper(trim((string) $grade));
+        $value = preg_replace('/\s+/', ' ', $value) ?? $value;
+        $value = str_replace(['.', '_', '-'], ['', '', ' '], $value);
+
+        return (bool) preg_match('/^Y(?:OUTH)?\s*\d*$/', $value);
+    }
 }