Calculations

Surface Area: 70.8 inches squared
Volume: 27.3 inches cubed

Dimensions

Each chip is an equilateral triangle with each side measuring from 2.5 to 3 inches
Each angle of each chip is 60 degrees
The container has two base sides, each is an equilateral triangle like the chips and each side measure three inches long while the height of the overall prism is 7 inches because we estimate each chip is about a fourth of an inch thick and 20 (chips) multiplied by .25 inches is 7 inches.