6/ Commission

A personal-computer salesperson receives a base salary of $1,034 per month and a commission of 7% of all sales over $10,000 during the month. If the monthly sales are $20,000 or more, then the salesperson is given an additional $571. Let E(s) represent the person's earnings per month as a function of monthly sales.

Consider the following values.

1. E(10000)
2. lims10000E(s)
3. E(20000)
4. lims20000E(s)

Compute 3. Round to the nearest cent.