Jan is rasing money for the homeless and discovers each church group requires 2 hr of letter writing and 1 hr of followup calls, while each labor union needs 2 hr of letter writing and 3 hr of followup calls. She can raise $150 from each church group and $175 from each union. She has a max. of 12 hrs of letter writing and 12 hours of followup avail. each month. Determine the most profitable mixture of groups she should contact and the most money she can raise in a month.
She should contact _____ church groups and ______ labor unions to obtain $______ in donations.