it seems that the posting will be in Islamabad and the no of seats are usually not displayed by the public sector organization. and only the person working in the said organization may know the no of seats approved by the competent authorities.hopefully it will be displayed or may be inquired at the date of interview from the relevant person.

the salary of JE ADMIN(SPS-7) is Rs.50,000/- and ASST MANAGER(SPS-8) salary is Rs.60,000/-
the post of JE is staff cadre while the post of asst manager is officer rank. the officer rank start from sps-8 while the staff cadre ends on junior executive. and it takes 4 to 5 years for promotion to the next cadre. and i hope that all the doubts will be cleared now.

now forget about the salary and start preparation for interview.