Question 735009
Simple Proportion.

m = "how much you pay", in dollars


2 kilograms / m = 1 kilogram / 3.95 dollars
{{{2/m=1/3.95}}}
their reciprocals will also equal
{{{m/2=3.95/1}}}
{{{m=2*3.95/1}}}
{{{m=7.90}}} dollars