Company A produces phones, monitors and calculators.with a selling price of $1000, $500, and $200 respectively, and variable costs of $750, $300, and $100 respectively.The prodcuts could be sold 100 units each per week. Phone requires 10 HRS of labor, monitors 5 HRS and calculators 1 HRS of labor andthe company itself could provide 800 HRS of labor per week available.

The quantity of each products to produce were resulted as the following:

80 units in phone

0 units in monitors

0 units in calculators

Then what is the most per hour that ABC would pay to hire extra workers?