Answer: Consumer surplus will decrease
Step-by-step explanation: Consumer surplus is the total amount of benefit the consumers get when they buy a good at a price that is less than their willingness to pay for it.
Consumer surplus = Willingness to pay - Market price
When Felix buy the last cutter at the market price of $5, the CS is,

When Tim buys the last cutter at the market price of $5, the CS is,

Thus, the CS falls by $2.