Unemployment benefits became payable to the company's qualified unemployed workers on January 1, 2005. Between that time and September 30, 2018, total benefits amounting to $15,100.90 were charged against the employer's account. Compute: In your computations, round amounts to the nearest cent. Round your final percentage answers to one decimal place. a. Contribution rate for 2019. b. Rate for 2019 if $2,000 additional benefits had been charged by mistake to the account of Karlson Software Company by the State Unemployment Compensation