How much did a year at Oxford cost in 1350?
The record: £8 10s 8d, 1374.
About $25,000 in today's gold
4 years of a farm labourer's pay.
Board, clothing and instruction for a well-born student; a poor scholar managed on £2–£3. Source
Who could buy it
The lowest paid on each ladder of 1350 whose pay was enough:
In other words, out of a farm labourer's reach: more than a whole year of his pay.