A company that makes baskets recently purchased a new equipment that reduced the labour cost. Prior to buying the equipment, the company used 4 workers who produced 80 baskets per hour, Labour cost was $10 per hour and machine cost was $40 per hour. With the new equipment, now the company uses 3 workers. However, the machine cost now increased by $10 per hour. The output also increased by 4 baskets per hour. By purchasing the new equipment, the labour productivity increased by: 10% productivity did not increase 20% 40%