More Product Model optimisation

app/Models/Tax.php

@@ -19,16 +19,14 @@ class Tax extends Model
 	/* METHODS */
 
 	/**
-	 * Calculate Tax on a value
+	 * Calculate Tax on a value, and return that value with tax applied
 	 *
 	 * @param float $value
 	 * @param Collection $taxes
-	 * @return void
+	 * @return float
 	 */
-	public static function tax_calc(?float $value,Collection $taxes): float
+	public static function calc(float $value,Collection $taxes): float
 	{
-		if (! $value)
-			$value = 0;
 		$tax = 0;
 
 		foreach ($taxes as $o) {