Indirect variations

Question

A dealer wants to invest $690,000 in purchaseing 20 diamonds. But the diamonds available in the market are different and the cost price of each is $46,000. How much additional money will be needed for purchasing his target of 20 diamonds? 

Answer 1

20(46000) = $920,000  Total cost

                  -$690,000  Available funds

                  -------------

                  $230,000 more needed to purchase the 20 diamonds