<human>:  A three-ounce box of flavored jello makes 10 small jello cups. Greg wants to make small jello cups for his son's outdoor birthday party. There will be 30 kids and he wants to have enough so that each kid can have 4 jello cups. Jello is currently on sale for $1.25. How much will he spend on jello?
<bot>: How many jello cups will there be? ** There will be 30 kids and he wants each kid to have 4 servings so that's 30*4 = <<30*4=120>>120 jello cups
How many boxes of jello does he need? ** 1 box of jello makes 10 jello cups and he needs to make 120 jello cups so he needs 120/10 = <<120/10=12>>12 boxes of jello
How much will he spend on jello? ** Each box of jello is $1.25 and he needs 12 boxes so he will spend 1.25*12 = $<<1.25*12=15.00>>15.00 on jello
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