2. In 2013, the United States Postal Service charged $0.46 to mail a letter weighing up to 1 oz. and $0.20 per ounce for each additional ounce. Which function would determine the cost, in dollars, c(z), of mailing a letter weighing z ounces where z is an integer greater than 1. 1) c(z) = 0.46z + 0.20 2) c(z) = 0.20z + 0.46 3) c(z) = 0.46(z - 1) + 0.20 4) c(z) = 0.20(z - 1) + 0.46 3. Last week, a candle store received $355.60 for selling 20 candles. Small candles sell for $10.98 and large candles sell for $27.98. How many large candles did the store sell? 1) 6 2) 8