please explain!

thanks

est Seved Help Save & Exit Sub Epic Electronics Company sells three lines of desks. Information about the inventory of desks as of the end of the year is as follows. If the lower of cost or market/NRV rule is applied to each product line individually, what is the amount of the inventory write down that Epic Electronic's must make? Product Line Cost per Unit Market Value per Unit Quantity Rustic $710 $745 210 Mediterranean 610 625 320 Contemporary 960 840 285 -01 Multiple Choice $12,150 o 522050 $14.700 534200