As of June 30, 2021 (the computation date for the 2022 tax rate), Sanchez Company had a negative balance of $1,190 in its unemployment reserve account in State A. The company's average payroll over the last three 12-month periods amounted to $500,000. The unemployment compensation law of State A provides that the tax rate of an employer who has a negative balance on the computation date shall be 7.2% during the following calendar year.

Using the tax rate schedule presented below, compute the following:

Reserve Ratio	Contribution Rate
0.0% or more, but less than 1.0%	6.7%
1.0% or more, but less than 1.2%	6.4%
1.2% or more, but less than 1.4%	6.1%
1.4% or more, but less than 1.6%	5.8%
1.6% or more, but less than 1.8%	5.5%
1.8% or more, but less than 2.0%	5.2%
2.0% or more, but less than 2.2%	4.9%
2.2% or more, but less than 2.4%	4.6%
2.4% or more, but less than 2.6%	4.3%
2.6% or more, but less than 2.8%	4.0%
2.8% or more, but less than 3.0%	3.7%
3.0% or more, but less than 3.2%	3.4%
3.2% or more	3.1%

a. The smallest voluntary contribution that Sanchez Company should make in order to effect a change in its tax rate.
$fill in the blank 1

b. The amount of the tax savings as a result of the voluntary contribution if Sanchez Company's taxable payroll for 2022 is $640,000.