The buyer is interested in 25kg instant milk powder (whole, full cream, and skim). They are requesting information about current product availability, product specifications (such as fat content, packaging sizes, origin), pricing and bulk discounts, minimum order quantity, lead time, shipping options, and available certificates (e.g., ISO, Halal). They also wish to know if samples are available, how to request them, any sample costs, and the estimated delivery timeline. They request additional documents like catalogs, technical sheets, or price lists.