poseidon swim company produces swim trunks. the average swlling price for one of their swim trunks is $$78\mathrm{.}40.$ the variae cost per unit is #$21,63$ poseidon swim has avwragw fixed costs per yeat of $ $6,342.$ assume that current level of sales is $356$ units. what will be the resulting percentagw changw in ebit if they expecr units sild to changes by $0\mathrm{.}7$ percent?