IO System Sales Management ERP APP. -. Confirmation quantity / unit price / amount of order requested by the construction company. -. Confirmation function such as item / standard (unit) requested by the construction company. -. Delivery date, delivery list, supply price confirmation function of transaction statement. - Inquiry Telephone: Weekdays: 09:00 ~ 18:00 (Lunch: 12:00 ~ 13:00)                       (Please avoid lunch time.)