Cents is a lot of money in manufacturing.

When I made consumer electronics our production team would swap parts based on cost. 1c on a million units is $10,000. They only had to save a few cents a year each to easily pay for themselves.

The rest was margin for the business.

Saving cents on a $80 BOM (bill of materials) may not sound like much but it really does add up when you're doing volume manufacturing.