Calloway Cab Company computes its break$-$even point strictly on the basis of cash expenditures related to fixed costs. Its total fixed costs are $$510,000,$ but $15$ percent of this value is represented by amortization. Its contribution margin $($price minus variable cost$)$ for each unit sold is $$4\mathrm{.}70.$ How many units does the firm need to sell to reach the cash break$-$even point? $($Round the final answer to the nearest whole number.$)$Cash break$-$even point