By Martin Baccardax Frito Lay sales growth once gain drove PepsiCo’s revenue gains despite CEO Mike Roman seeing “higher than expected input cost inflation for the balance of 2022.” PepsiCo (PEP) – Get PepsiCo, Inc. Report posted better-than-expected first quarter earnings Tuesday, while boosting its full-year revenue forecast, as the group’s Frito Lay snacks division continues to drive topline growth PepsiCo said core earnings for the three months ending in March were pegged at $1.29 per share, up 6.6% from the same period last year and 7 cents ahead of the Street consensus forecast. Group re…