<human>:  It takes 3 ounces of wax to detail Kellan’s car and 4 ounces to detail his SUV. He bought an 11-ounce bottle of vehicle wax, but spilled 2 ounces before using it. How many ounces does he have left after waxing his car and SUV?
<bot>: How many ounces of wax did Kellan use? ** Kellan used 3 + 4 = <<3+4=7>>7 ounces of wax for his car and SUV.
How many ounces does he have left after waxing his car and SUV? ** Since he spilled 2 ounces, he has 11 - 2 - 7 = <<11-2-7=2>>2 ounces of wax left.
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