The Pine Valley Credit Union is trying to schedule bank tellers. The credit union is open 8 a.m.–6 p.m. and needs the number of tellers each hour as shown in the following table. Fulltime tellers can work 8 a.m.–5 p.m. (with a noon–1 p.m. lunch hour) or 9 a.m.–6 p.m. (with a 1 p.m.–2 p.m. lunch hour). Part-time tellers work 10 a.m.–2 p.m. Full-time tellers receive $300 per day, and part-time tellers receive $60 per day. At most, four part-time tellers can be hired. How can the credit union minimize their daily teller salary cost?

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Needed 4 8 6 4 9 8 5 4 4 10 5 Time 8-9 9-10 10-11 11-12 12-1 1-2 2-3 3-4 4-5 5-6