Answer: $1562
Step-by-step explanation:
Since the attorney charges a flat fee of $50 and 21% of what he can collect for Lee from customers whose accounts are past due, then if be collected $7200 from last due, the total fee that the attorney will earn will be:
= $50 + (21% × $7200)
= $50 + (0.21 × $7200)
= $50 + $1512
= $1562
Therefore, the amount that the attorney will earn is $1562