first upload all files

Modules/Option/Entities/OptionValue.php

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+<?php
+
+namespace Modules\Option\Entities;
+
+use Modules\Support\Money;
+use Modules\Support\Eloquent\Model;
+use Modules\Product\Entities\Product;
+use Modules\Support\Eloquent\Translatable;
+
+class OptionValue extends Model
+{
+    use Translatable;
+
+    /**
+     * The relations to eager load on every query.
+     *
+     * @var array
+     */
+    protected $with = ['translations'];
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = ['price', 'price_type', 'position'];
+
+    /**
+     * The attributes that are translatable.
+     *
+     * @var array
+     */
+    protected $translatedAttributes = ['label'];
+
+    public function getPriceAttribute($price)
+    {
+        if ($this->priceIsPercent()) {
+            return $price;
+        }
+
+        return Money::inDefaultCurrency($price);
+    }
+
+    public function priceIsPercent()
+    {
+        return $this->price_type === 'percent';
+    }
+
+    public function priceIsFixed()
+    {
+        return $this->price_type === 'fixed';
+    }
+
+    public function priceForProduct(Product $product)
+    {
+        if ($this->priceIsFixed()) {
+            return $this->price;
+        }
+
+        return $this->getPercentOf($product->selling_price->amount());
+    }
+
+    private function getPercentOf($productPrice)
+    {
+        return Money::inDefaultCurrency(($this->price / 100) * $productPrice);
+    }
+
+    public function formattedPriceForProduct(Product $product, $forSelectOption = false)
+    {
+        $price = $this->priceForProduct($product);
+
+        if ($price->isZero()) {
+            return;
+        }
+
+        $formattedPrice = $price->convertToCurrentCurrency()->format();
+
+        if ($forSelectOption) {
+            return "+ {$formattedPrice}";
+        }
+
+        return "<span class='extra-price'>+ {$formattedPrice}</span>";
+    }
+}