Check the roll reveal for FROZEN before the barber's name and ×1.4 MONEY beneath it. That multiplier is the Frozen mutation's money effect.
A FROZEN Trim Tom result can still be labeled Common. Its Snow roll reveal displays 1 in 73; that number belongs to that particular barber result. The weather's 7% describes the chance of receiving the Frozen mutation on a roll, so the two values answer different questions.
Use the barber directory to look up individual characters and their conditional stats, or the mutation guide to compare mutation effects.