Answer:
None it is 10880 cell phones sold
Step-by-step explanation:
You calculate the all the percentages of 4000 to get to the answer like this ......
4,000 of 22%
=22×4,000
100
4000+880
4880
4,000 of 50%
50×4000
100
2000
4000+2000
6000
4880+6000
=10880