codigo actual del servidor, con avances de joan

app/Models/CarrierRangePrice.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class CarrierRangePrice extends Model
+{
+    use HasFactory;
+
+    public function carrier()
+    {
+        return $this->belongsTo(Carrier::class);
+    }
+
+    public function carrier_ranges()
+    {
+        return $this->belongsTo(CarrierRange::class);
+    }
+
+    public function zone()
+    {
+        return $this->belongsTo(Zone::class);
+    }
+}