Current Attempt in Progress In 2022, Sheffield sold 7800 units at $ 500 each. Unit variable cost was $250 and fixed expenses totaled S 420000. The same unit selling price is expected for 2023. Sheffield is tentatively planning to invest in equipment that would increase fixed costs by 20% while decreasing unit variable cost by 20%. If Sheffield makes the investment, what will be the break-even point in sales units for 2023 O 2016 1680 O 2520 2100