line of VCRs$?$ Why?

$6.$ Max Leonard, vice president of Marketing for Dysk Computer, Inc., must decide whether to introduce a midpriced version of the firm's DC$6900$ personal computer product line$-$the DC$6900-$X$.$ The DC$6900-$X would sell for $$3,900,$ with unit variable costs of $$1,800.$ Projections made by an independent marketing research firm indicate that the DC$6900-$X would achieve a sales volume of $500,000$ units next year, in its first year