Specific design ideas explored by wolfgang weingart and his students in the late 1960s and early 1970s and adopted a decade later include letter-spaced, sans-serif type; bold, stair-stepped rules; diagonal type; the introduction of italic type and/or weight changes within words; and type reversed from a series of bars.

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1400 - 15% to get the answer.

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by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.