A convenience store manager earns a base salary plus a small bonus of $60 for each of ten different possible monthly milestones he meets. If the manager meets a milestone, the full bonus is paid. However, if the manager falls even one penny short, none of that bonus is paid. Suppose each of the ten milestones requires 40 hours of effort to meet, and that the manager has 160 hours of effort to allocate to work each month.

In order to maximize the total monthly bonus, the manager should allocatehours toward meeting each of milestones andhours toward meeting each of the remaining sales milestones.