A full-size grid-tied solar array with about 15 or 20 panels can cost anywhere between $25,000 and $40,000 upfront depending on the size. AC panels are not cheaper, but proponents say the modularity makes it easier to install a few panels, and then later connect more to the existing set. More flexibility.
Evil, in a general context, is the absence or opposite of that which is described as being good. Often, evil is used to denote profound immorality. In certain religious contexts, evil has been described as a supernatural force. Definitions of evil vary, as does the analysis of its motives.
Well, first it's worth making clear that 'fair' in this context has connotations of beauty, wholeness, goodness. Foul is the opposite- ugliness, decay, evil. So it boils down to good is evil, evil is good.. It is said by the three witches at the end of the play's opening scene, and underlines just how uncompromisingly and irredeemably evil they are- to them, everything virtuous is disgusting, and everything loathsome is desirable.