Solution:
a) In equilibrium , Q = 3244-283 P
Qs=1944+207 P
Q = Qs
3244-283 P = 1944+207 P
P = $2.65
Export demand = Total demand - Domestic dd
= 1544 - 176 P
Its given that export demand for wheat falls by 40% , so the new export demand is 0.6 [ 1544 - 176 P ] .
Total demand = Export dd + Domestic dd
= 2626.4 - 212.6 P
To find equilibrium ,
Total demand = Total supply
2626.4 - 212.6 P = 1944+207 P
P = $ 1.63
Q = 2280.65
Yes , Farmers will worry because of fall in price.
b) When P = $3.5
Qp = 2626.4 - 212.6 ( 3.5 )
Qp = 1882.3
Qs = 2668.5
Excess supply = Qs - Qp
= 2668.5 - 1882.3
= 786.2 Million Business
If U.S government gives a price of $3.5
Total spending = 3.5(786.2)
= $2751.7 Million