An accounting firm has 1428 hours of staff time and 250 hours of reviewing time available each week. The firm charges $140 for an audit and $35 for a tax return. Each audit requires 84 hours of staff time and 10 hours of review time. Each tax return requires 14 hours of staff time and 5 hours of review time. What number of audits and tax returns will yield the maximum revenue?
1)Audits = ?
2) tax returns = ?
3) What is the maximum revenue?

Question

An accounting firm has 1428 hours of staff time and 250 hours of reviewing time available each week. The firm charges $140 for an audit and $35 for a tax return. Each audit requires 84 hours of staff time and 10 hours of review time. Each tax return requires 14 hours of staff time and 5 hours of review time. What number of audits and tax returns will yield the maximum revenue? 
1)Audits = ?
2) tax returns = ?
3) What is the maximum revenue?