The operation was so small that he could not afford a computer to keep track of inventory .
The positive feedback from others prompted Plank to officially start a business selling the synthetic shirts to college programs using his grandmother 's basement as the headquarters .
The operation was so small that Plank could not afford a computer to keep track of inventory .
The positive feedback from others prompted Plank to officially start a business selling the synthetic shirts to college programs using his grandmother 's basement as the headquarters .