Carlos does his online trading with Super Trade. Super Trade's rates are listed in the table below.

a. If Carlos makes three dozen online trades in a year, what is the total of his broker fees?
b. What is the cost of 99 online trades?
c. What is the cost of 120 online trades?
d. If he makes t online trades in a year, and t > 100, express the total of his broker fees algebraically.
e. Suppose Carlos made q online trades and t automated telephone trades last year, where q + t f. Suppose Carlos makes 20 trades in a year. If Carlos purchased x shares of stock for y dollars each using a phone call to a live broker, express the total broker fee algebraically.

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Fee Schedule for Super Automated Telephone Telephone to a Live Trade Discount Broker Online Trades Trades Broker less than 100 trades per $17 per trade year Online fee plus $11 | 6 commission plus 4 online fee 100 or more trades per year | $17 per trade for the first 100 shares, $14 per trade for trades over 100 | Online fee plus $11 % commission plus 2 online fee