Search for common post codes

Sheet 1. I have a list of customers (A), their revenue (B) and basic post codes (C). Note there may be more than one customer at that postcode (duplicates) (see bold font)

Sheet 2. I have a 2nd shorter list of unique post codes - some will match those in Sheet 1 (I have marked in yellow). I want to compare Sheet 2 column A against Sheet 1 column C in order to work out the total revenue of those common post codes. If the common post codes can be highlighted in some way, I can then filter (perhaps by colour) and then get the total.

Kudos to whoever can solve this
Thank you in advance