public function getPriceForWeight(int $weight): float 	{ 		if ($weight <= 2000) { 			return $this->up_to_2_kg_price; 		}  		if ($weight <= 5000) { 			return $this->up_to_5_kg_price; 		}  		if ($weight <= 10000) { 			return $this->up_to_10_kg_price; 		}  		if ($weight <= 15000) { 			return $this->up_to_15_kg_price; 		}  		if ($weight <= 20000) { 			return $this->up_to_20_kg_price; 		}  		if ($weight <= 25000) { 			return $this->up_to_25_kg_price; 		}  		return $this->up_to_31_5_kg_price; 	}