Only part C is wrong. Please help with part C. Thanks

A health club has 2 employees who work on lead generation. Each employee contacts leads 20 hours a week and is paid $22 per hour. Each employee contacts an average of 180 leads a week. Approximately 11% of the leads become members and pay a onetime fee of $100. Material costs are $190 per week, and overhead costs are $1,100 per week. a. Calculate the multifactor productivity for this operation in fees generated per dollar of input. (Do not round intermediate calculations. Round your final answer to 2 decimal places.) MFP = 1.82 dollars of fees per dollar of input b. The club's owner is considering whether to purchase a new software program that will allow each employees to contact 20 more leads per week. Material costs will increase by $160 per week. Overhead costs will remain the same. Calculate the new multifactor productivity if the owner purchases the software. (Do not round intermediate calculations. Round your final answer to 2 decimal places.) New MFP = 1.88 dollars of fees per dollar of input one c. How would purchasing the software affect productivity? (Enter the change in productivity as a percentage rounded decimal.) Productivity will increase by 0.3 % with the new software