I think its the architect and real estate agent vet sorry i can't do more
Step-by-step explanation:
Architect: you might need a license to show that you are capable of building a safe and sturdy house
Real estate agent: you need to be extremely educated in real estate to get this job so you might need a license stating that you are a professional or you are cable for the job
Vet: they need to make sure you are capable of taking care of animals before you get the job
78×4000=312000 100×x=100x 312000÷100=3120 3120+4000=7120<----2nd month 7120×0.5=3560<----3rd month 4000<----1st month 4000+3560+7120=14680<----Your answer, this is the total of the three months.