You are working as a checkout clerk at Surprise Discount, Inc., a local department store. Sarah Johnson, an elderly lady, comes through your line with what she describes as “the perfect gift for my great-grandson.” She says that she never expected to find it for under $200 much less the $110 that it is marked at. She writes out a check for the purchase. After she has left the store, you realize that she has written the check for $17.50 rather than the $117.50 purchase price plus tax. However, there is plenty of room to alter the amount to the correct figure. Should you do so?