Which statement BEST reflects the relationship among job costing, cost control, and Activity-Based Costing?

A contractor wins a bridge project using a bid estimate prepared 18 months before construction begins. During execution:Steel prices increase by 25%Labor productivity declines because of labor shortagesEquipment utilization remains as plannedProject overhead remains unchangedThe project experiences a significant profit reduction. Which factor most directly explains why the original estimate became unreliable?

An inaccurate estimate can still produce a favorable cost variance if actual project performance exceeds expectations.

All indirect costs should be allocated using the same allocation base to maintain consistency.

A cost that is direct at the project level may become indirect when viewed from an individual work-package level.

A project manager classifies the salary of a site supervisor as a direct project cost. The company accountant classifies the same cost as an indirect cost. Which statement is MOST accurate?

A contractor experiences the following:Budgeted labor cost: $2,000,000Actual labor cost: $2,600,000Material cost variance: favorableEquipment costs: on budgetWhich conclusion is MOST justified?

How many grams of oxygen are formed when 6.25 moles of KOH are formed? 4 KO(s)  +  2 H2O(l)  →  4 KOH(s)  + O2(g)

How?

Carbonic acid (H2CO3; MM = 62.03 g/mol) can form water and carbon dioxide upon heating.  How much carbon dioxide (in grams) is formed from 12.4 g of carbonic acid? H2CO3(aq)  →  H2O(l)  +  CO2(g)