World's 7th richest man Buffett's wife heard complaining about $4 coffee at event: Reports

Billionaire investor and world's seventh richest man Warren Buffett's wife Astrid was overheard complaining to employees about paying $4 (₹320) for a coffee at Allen & Co's annual event at a resort in US' Idaho, according to reports. The 77-year-old was reportedly heard saying that she "could get a pound of coffee" for the same price elsewhere.