Is the salary package offered OK for a job in Norway ?

Hi all, i had been offered a job as Quantity Surveyor in oil & gas company in Oslo. I have BSc. Civil Engineering & 4 years and half experience in oil & gas QS. They offered me salary package which are: Hourly rate of NOK 360 + 12 % vacation pay + Mob/demob, VISA, pension, insurance and all costs decreed by law covered by PDS(hired HR consultant) Accomodation and home travel not covered. My questions are: 1. Is the package seem OK for single income parent with 3 kids (3,1 yrs and 2 months old)? 2. base on the hourly rate offered, what is the total annually income will be? consider july is vacation month with 12% pay and deduction of tax. 3. is the salary offered to low & should i negotiate to ask more higher rate or other benefits regarding the cost of living, my qualification & experience? Any advise would be very much appreciate. Thank you very much ; )