Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Mary, Jess, and Christina want to decorate a party room with balloons. Each person inflates balloons at different speeds, and they only have 30 minutes to inflate as many balloons as possible. Mary inflates 10 balloons per minute, Jess inflates 7 balloons per minute and Christina came 15 minutes late and was the slowest one inflating 4 balloons per minute. How many balloons can they inflate before running out of time?

### Response:
 Mary atafurika jumla ya maputo 10/dakika x dakika 30 = <<10*30=300>>300 maputo
Jess atafurika jumla ya maputo 7/dakika x dakika 30 = <<7*30=210>>210 maputo
Christina atafurika jumla ya maputo 4/dakika x dakika 15 = <<4*15=60>>60 maputo
Kwa kuunganisha maputo yote, wamefanya maputo 300 + maputo 210 + maputo 60 = <<300+210+60=570>>570.