Modifies provisions relating to the calculation of sales tax for certain cash transactions

SB 1620 allows retail vendors to round the final total of cash transactions to the nearest five cents, avoiding fractional pennies. Specifically, totals ending in $0.01-$0.02 or $0.06-$0.07 round down, while $0.03-$0.04 or $0.08-$0.09 round up. This rounding applies only to cash payments and does not change how tax is calculated or reported - vendors must still remit the correct tax amount based on established brackets. The bill directly affects businesses collecting sales tax on cash sales in Missouri, ensuring simplified transaction handling without altering tax liability.