The big management reporting challenge: Cash management

Take the latest test from CIMA for a chance to win a bottle of wine.
This week, the Chartered Institute of Management Accountants (CIMA) has sent us a question on cash management (see below). As usual, post your answers as comments below and we'll add to the thread with the correct answer in due course. The member that gives us the best answer will win a bottle of wine.
Continued...
The full article is available to registered AccountingWEB members only. To read the rest of this article you’ll need to login or register.
Registration is FREE and allows you to view all content, ask questions, comment and much more.
Or if you are already registered, login here

Answers
Spread = 3 * [(3/4 * $30 * $300,000 / 0.025%) ^ (1/3)] = $9,000
Upper Limit = Lower Limit + Spread = $2,500 + $9,000 = $11,500
Return Point = Lower Limit + (1/3 * Spread) = $2,500 + $3,000 = $5,500