Answer: Exporting
Step-by-step explanation:
Exporting is the cheapest method of entering another market because it does not involve the building or maintenance of any business in the new market and neither does it involve any profit sharing as all the profits go to the company exporting.
With exporting, a company just ships its products to the new market it wants to enter without establishing a presence. Companies there will then buy these goods and sell them. This is what Heat Tough Inc is doing so this must be exporting.