'decimal:2', 'unit_cost' => 'decimal:2', ]; } public function requisition(): BelongsTo { return $this->belongsTo(MaterialRequisition::class, 'material_requisition_id'); } public function material(): BelongsTo { return $this->belongsTo(Material::class); } public function getLineTotalAttribute(): float { return (float) $this->quantity * (float) $this->unit_cost; } }