Laid-Back Labor : The $140 Homemade Scarf여유로운 노동 : 140달러의 집에서 만든 스카프UNIT3. ... Even if her labor is valued at only $10 an hour, thescarf costs at least $140―or roughly $100 more than ... The advent of the player piano―a music-making machine that required zero talent―drove the boom even further