Answer:
Save time.
Save cost.
Step-by-step explanation:
Save time: Time that would have been spent in outsourcing the job to people who can do them, with the accompanying risks of delays and disappointments being bypassed. Time is an essential factor in business because when goods are not available on customer's demand, they might have to seek other options.
Save cost: Mohammed will save the additional cost of payments to businesses that do other jobs for him. He saves money when he only has to pay three workers instead of four or more workers. This will mean more profit for his business.