Answer:
a. Annual consumer expenditure
9,000,000,000* $0.24= $2.16 billion
b. farmers receive for wheat production
19,000,000,000* $0.24=$4.56 billion
c. government expenditure on wheat
total production by farmers minus total purchase by consumers (because excess production is stored by the government)
$4.56 billion - $2.16 billion = $2.46 billion