How much is a beam in money?

Could you possibly elaborate on the query, 'How much is a beam in money?'? I'm curious to understand the context behind this inquiry. Are you referring to a specific currency or financial instrument? Or perhaps this is a phrase related to some historical or cultural reference? It seems like an unusual unit of measurement for money, so I'm quite intrigued. Could you please provide more details or clarify your intention with this question? It would greatly assist me in providing an accurate and informative response.