Brent crude futures were down $0.40, or 0.5%, to $78.07 a barrel at 1005 GMT and West Texas Intermediate crude was also down $0.40, or 0.5%, to 73. .46 dollars per barrel. “Oil investors should be cautious ahead of the US CPI and China economic data series later this week,” CMC Markets analyst Tina Teng said of inflation data due to be released next Wednesday. Friday’s data pointed to the lowest job gains in two