The bid quantity for unsuitable soil was 500 cy at $38/cy. Field measurements show 620 cy. What added payment is due for the overrun?
Correct Answer
A) $4,560
The overrun is 620 - 500 = 120 cy. Added payment is 120 x $38 = $4,560. Other choices use 100 cy, 110 cy, or the full measured quantity.
Why This Is the Correct Answer
The overrun is 620 - 500 = 120 cy. Added payment is 120 x $38 = $4,560. Other choices use 100 cy, 110 cy, or the full measured quantity.
Why the Other Options Are Wrong
Option B: $3,800
unit price adjustment, choice a: $3,800 prices 100 units at $38.
Option C: $4,180
unit price adjustment, choice b: $4,180 is wrong because $4,180 prices 110 units at $38.
Option D: $23,560
unit price adjustment, choice d: $23,560 prices 620 units at $38, using 620 from the stem instead of the accepted quantity 120. Unit-price check.
Memory Technique
Picture a scope box labeled unit price adjustment: finish every operation before accepting $4,560.
Reference Hint
Open Construction Project Management, 5th Ed. (2022); use the index entry or section for "Unit-price quantity adjustment" to confirm that The overrun is 620 - 500 = 120 cy.
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