The project will take 64 working days to complete, starting on September 1st 2014 and finishing on November 27th 2014, requiring 512 working hours at a total cost of $53,760. Since components will be built in parallel, 8 employees are needed and each will work about 64 hours. The document also provides a breakdown of time and cost estimates per phase of development for the project.

1. The total number of days to complete the project is 64.
Thus, if the project starts on 1st September 2014, it will finish on 27th November 2014 if we consider 64 working days.
Hence the total number of working hours would be 512 (64*8) which would come down to a total cost of 53,760$. For an android app, this is a very reasonable budget.
Since building the components will happen in parallel, we only need around 8 employees for various tasks in the project. Thus each employee needs to give about 64 hours for this project.
The critical path can be seen in the project file that is included with the summary.
The following is a breakup of time and cost required per phase of the software development.
Number of Hours
Cost
Requirements
208
21840
System Design
104
10920
Implementation
136
14280
Testing
72
7560
Deployment
72
7560
Training
48
5040