For the first company, the total earnings, \( E_1 \), are given by:
\[ E_1 = 5000 + 0.01S \]
where \( 5000 \) is the fixed salary and \( 0.01S \) is the 1% bonus on total sales.
For the second company, the total earnings, \( E_2 \), are given by:
\[ E_2 = 0 +
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