01TheDefinitionof鈥淧rice鈥Pricesdeterminehowresourcesaretobeused.Theyarealsothemeansbywhichproductsandservicesthatareinlimitedsupplyarerationedamongbuyers.ThepricesystemoftheUnitedStatesisacomplexnetworkcomposedofthepricesofalltheproductsboughtandsoldintheeconomyaswellasthoseofamyriadofservices,includinglabor,professional,transportation,andpublic-utilityservices.Theinterrelationshipsofallthesepricesmakeupthe鈥渟ystem鈥ofprices.Thepriceofanyparticularproductorserviceislinkedtoabroad,complicatedsystemofpricesinwhicheverythingseemstodependmoreorlessuponeverythingelse.Ifoneweretoaskagroupofrandomlyselectedindividualstodefine鈥減rice鈥?manywouldreplythatpriceisanamountofmoneypaidbythebuyertothesellerofaproductorserviceor,inotherwordsthatpriceisthemoneyvaluesofaproductorserviceasagreeduponinamarkettransaction.Thisdefinitionis,ofcourse,validasfarasitgoes.Foracompleteunderstandingofapriceinanyparticulartransaction,muchmorethantheamountofmoneyinvolvedmustbeknown.Boththebuyerandthesellershouldbefamiliarwithnotonlythemoneyamount,butwiththeamountandqualityoftheproductorservicetobeexchanged,thetimeandplaceatwhichtheexchangewilltakeplaceandpaymentwillbemade,theformofmoneytobeused,thecredittermsanddiscountsthatapplytothetransaction,guaranteesontheproductorservice,deliveryterms,returnprivileges,andotherfactors.Inotherwords,bothbuyerandsellershouldbefullyawareofallthefactorsthatcomprisethetotal鈥減ackage鈥beingexchangedfortheasked-foramountofmoneyinorderthattheymayevaluateagivenprice.02TheLanguageofMusicApainterhangshisorherfinishedpicturesonawall,andeveryonecanseeit.Acomposerwritesawork,butnoonecanhearituntilitisperformed.Professionalsingersandplayershavegreatresponsibilities,forthecomposerisutterlydependentonthem.Astudentofmusicneedsaslongandasarduousatrainingtobecomeaperformerasamedicalstudentneedstobecomeadoctor.Mosttrainingisconcernedwithtechnique,formusicianshavetohavethemuscularproficiencyofanathleteoraballetdancer.Singerspracticebreathingeveryday,astheirvocalchordswouldbeinadequatewithoutcontrolledmuscularsupport.Stringplayerspracticemovingthefingersofthelefthandupanddown,whiledrawingthebowtoandfrowiththerightarm鈥攖woentirelydifferentmovements.Singersandinstrumentshavetobeabletogeteverynoteperfectlyintune.Pianistsaresparedthisparticularanxiety,forthenotesarealreadythere,waitingforthem,anditisthepianotuner鈥檚responsibilitytotunetheinstrumentforthem.Buttheyhavetheirowndifficulties;thehammersthathitthestringhavetobecoaxednottosoundlikepercussion,andeachoverlappingtonehastosoundclear.Thisproblemofgettingcleartextureisonethatconfrontsstudentconductors:theyhavetolearntoknoweverynoteofthemusicandhowitshouldsound,andtheyhavetoaimatcontrollingthesesoundwithfanaticalbutselflessauthority.Techniqueisofnouseunlessitiscombinedwithmusicalknowledgeandunderstanding.Greatartistsarethosewhoaresothoroughlyathomeinthelanguageofmusicthattheycanenjoyperformingworkswritteninanycentury.03TheBeginningofDramaTherearemanytheoriesaboutthebeginningofdramainancientGreece.Theonmostwidelyaccepte