<human>:  Mr. Alonzo harvested 245.5 kg of tomatoes. He sold 125.5 kg to Mrs. Maxwell and 78 kg to Mr. Wilson. How many kilograms of tomatoes are not sold?
<bot>: How many kilograms of tomatoes were sold? ** Mr. Alonzo was able to sell 125.5 + 78 = <<125.5+78=203.5>>203.5 kg of tomatoes.
How many kilograms of tomatoes are not sold? ** So, there are 245.5 - 203.5 = <<245.5-203.5=42>>42 kg unsold tomatoes.
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