You manage a factory that produces t-shirts and sells each for $8. You pay your workers a wage of $50 per day. The following table shows your factory's daily total output of t-shirts based on the number of workers that you hire.

Number of Workers	Total Output
1	30
2	35
3	45
4	57
5	70
6	85
7	95
8	103
9	110
10	115

Diminishing marginal returns starts to occur after ______________ workers.

You should hire _____________ workers to maximize profit.