While out shopping for new clothes, Xaoting sees a sign for cozy socks advertised on sale for $3.50 per pair. The regular price of the socks is $5 per pair. Xaoting buys 3 pairs and notices that the socks do not ring up at the advertised sale price, so she has the cashier do a price check. If the sales tax is 8%, how much does Xaoting save by paying attention at the register? a. $3.66 b. $4.50 c. $4.86 d. $5.70
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