purchase.customer_id = session[:customer_id]
purchase.date = Time.now.to_date
purchase.price = @rentable.calculated_price
purchase.customer_id = session[:customer_id]
purchase.date = Time.now.to_date
purchase.price = @rentable.calculated_price
purchase.customer_id = session[:customer_id]
purchase.date = Time.now.to_date
purchase.price = @merchandise.price
purchase.customer_id = session[:customer_id]
purchase.date = Time.now.to_date
purchase.price = @merchandise.price