Determine credit card interest?

How to determine credit card interest? I’m not sure how to use the example provided in my math book. It just does not seem to work for me.

Book example:

Previous Balance: $150.00

Minimum payment: $10.00

Interest per-annum: 18.6% (compounded daily)

$\displaystyle

140 * (1 + \frac {0.186}{365}) (365 * \frac {1}{12})

$

= 142.19

----------------

First off, if I enter that in my calculator I receive a syntax error; with or without the (365 x 1/12)

Second, if I use my own formula I receive a different answer:

1. 0.186 ÷ 12 = 0.0155 (Monthly Rate)

2. 0.0155 x 140 = 2.17 (different then the 2.19 shown in the example)

Please clarify!