Chapter Contentment is true Riches to Cool Hundred of C by Brewer's Phrase & Fable

Cool as a Cucumber Perfectly composed; neither angry nor agitated in the least.

Cool Hundred (A) or Cool Thousand (or any other sum) means entire, or the whole of 100. Cool, in this case, means not influenced by hot-headed enthusiasm or exaggeration.

“I lost a cool hundred myself.”- Mackenzie.