I was solving a very simple model found in a forum: given a total cost in € (or $\$$, if you are reading from across the ocean) for a set of projects, and the hourly cost of 3 technician involved, find the integer number of hours each one should spend on it. The aim is minimizing the wasted time, that is, solve the following
$$
\min \left| TC - \sum_{i=1}^{3} c_{i} k_{i} \right| \; \; s.t. k_{i} \in \mathbb{N}
$$
The problem was to be solved for a number of rows, with different costs.
