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

### Instruction:
Iris has a berry farm. Her brother and sister help her to pick up the berries and sell them to the market. Iris picked 30 blueberries, her sister picked 20 cranberries, and her brother was able to pick 10 raspberries. If 1/3 of the total berries they were able to pick are rotten and the remaining 1/2 of the fresh berries need to be kept, how many berries will they be able to sell?

### Response:
 Idadi ya matunda ya bluberi na cranberi ni 30 + 20 = <<30+20=50>>50.
Ukiongeza matunda ya rasberi, idadi ya matunda yote ni 50 + 10 = <<50+10=60>>60.
Matunda yaliyooza ambayo yanahitaji kutupwa ni (1/3) x 60 = <<(1/3)*60=20>>20.
Idadi ya matunda safi ni 60 - 20 = <<60-20=40>>40.
Matunda ambayo wanahitaji kuyahifadhi ni (1/2) x 40 = <<40*1/2=20>>20.
Hivyo, idadi ya matunda watakayoweza kuyauza ni 40 - 20 = <<40-20=20>>20.