Company B loses $1,575 for every employee

To solve this, we need to consider the employees who quit before 90 days:

• 2 employees quit before 30 days: $2\times \mathrm{\$}1,5752\; \backslash times\; \backslash \$1,575$
  
• 1 employee quits on Day 41: $1\times \mathrm{\$}1,5751\; \backslash times\; \backslash \$1,575$
  
• 1 employee quits on Day 100: No loss, since it is after 90 days.

So, the total amount the company will lose is:

$2\times \mathrm{\$}1,575+1\times \mathrm{\$}1,575=3\times \mathrm{\$}1,575=\mathrm{\$}4,725$

Therefore, the correct answer is:

$4,725