What is the benefit of the cisg assuming both countries

Question

Problem

You are the C.E.O. for a major U.S. retailer. You buy 2,000 Samsung phones from South Korea for resale in my stores and a limited edition gold plated one for myself.

(a) Will the C.I.S.G. apply to these purchases? Explain.

(b) What is the benefit of the C.I.S.G.?

(c) Assuming both countries follow the C.I.S.G. does it have to govern a potential dispute? Explain.