Arkansas does not allow local jurisdictions like cities or counties to collect a local sales tax. The Arkansas state sales tax of 6.5% is applicable statewide. You can view the sales tax rates for various cities in Arkansas here.
Equitable adjustment is a term of art that includes an adjustment to fee, and the target. minimum, and maximum fees should not be increased in this case for what I hope are obvious reasons. The adjustment should be limited to the effect of the new wage determination on wages and fringes.
Where the change is necessitated by defective specifications and drawings, the equitable adjustment to which a contractor is entitled must, if it is to be equitable, i.e. fair and just, include the costs which it incurred in attempting to perform in accordance with the defective drawings..