I am just start reading this story, and the so far I am still get on the plot. But I think a change of the currency expression might be good. It's that very few people would say the currency formally like the English pound or US dollars in a daily life conversation. We are assuming these two guys are both English, or British for that matter. They are from the same country. In work, it is very rare for them to address their currency that formal. They very much would say it in passing given the background. So they can say 100,000 pounds or more likely 100,000 quids.
