Juniper enterprises sells handmade clocks. its variable cost per clock is $6, and each clock sells for $24. calculate juniper's contribution margin per unit and contribution margin ratio.

Joe pays ann to mow his lawn and ann mows vanna's lawn by mistake. vanna peers out her window and sees ann mowing, yet says nothing to ann about her mistake since vanna needs to have her lawn mowed. when ann approaches vanna for payment, vanna refuses, arguing that she never asked ann to mow her lawn. under these circumstances, ann can recover payment from vanna under: