120 square meters Two 40HC boxes are just right. Your goods seem to have a lot of square meters per case.

It is more suitable for customers to choose 40HC, because the sea freight of 40GP and 40HC in most destination ports is the same. According to experience, 40GP can hold about 58 cubic meters at most. If it is forcibly loaded with 60 cubic meters, it is very risky. Once it can't be loaded, it will be very troublesome. Either change the container or reduce the goods, and confirm with the consignee. During this period, the wasted time may delay the shipping schedule and generate many unnecessary expenses.

There is basically no need to consider freight savings, but the freight rates of 40GP and 40HC of individual ports and individual shipping companies are different.