Calculators normally cost £$$6$$ and protractors normally cost $$30$$p.  In a sale, calculators have been reduced by a quarter and protractors are half price.  David bought $$8$$ calculators and $$20$$ protractors.  How much did he have to pay?  ANSWER~\uline{~~~~~~~~~~}~ 
Overseas Competition->Knowledge Point->Word Problem Modules->Applying of Multiplication and Division