The typical Costco Wholesale Service Assistant salary is $13. Service Assistant salaries at Costco Wholesale can range from $12 - $21. This estimate is based upon 16 Costco Wholesale Service Assistant salary report(s) provided by employees or estimated based upon statistical methods. When factoring in bonuses and additional compensation, a Service Assistant at Costco Wholesale can expect to make an average total pay of $27,300 . See all Service Assistant salaries to learn how this stacks up in the market.
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