Answer
More than $3$ units.
Work Step by Step
Let $x$ be the number of units to produce per hour and $y$ be the total pay per hour.
The system of equations of the situation is:
$$\begin{cases}y=13.75\\y=1.25x+10\end{cases}$$
To break-even, equate the two equations:
$$13.75=1.25x+10$$
$$3.75=1.25x$$
$$x=\frac{3.75}{1.25}=3$$
Thus, the number of units to produce per hour for the second job to pay more than the first job is more than $3$ units.
