80 and 90

90 and 80

85 and 75

75 and 83

comparison of profit and loss

comparison of assets and liabilities

change in output due to change in input

economics of cost and benefits of the project

longest duration

highest cost slope

least cost slope

shortest duration

the detailed estimated cost based on detailed design

the several alternatives of the project that have been considered

the soil survey, traffic survey, concept design and approximate cost

the contract documents for inviting tenders

ISMB

ISLB

ISHB

ISWB