premise: Oil prices this Tuesday rose sharply in New York and London reaching a record 42,33 US dollars per barrel, 2.45 US dollars more than last Friday.
hypothesis: One barrel price was 39.88 US dollars last Friday.
reason: Oil prices this Tuesday rose sharply in New York and London reaching a record 42,33 US dollars per barrel, 2.45 US dollars more than last Friday.  42,33 - 2.45 = 39.88 US dollar