You are looking to purchase a small piece of land in Hong Kong. The price is only $60,000 per square meter! The land title says the dimensions are 20 m x 30 m. By how much would the total price change, in dollars, if you measured the parcel with a steel tape measure on a day when the temperature was 20°C above normal? Assume the coefficient of thermal expansion of steel at 20°C is 1.2x10⁻⁶ C.

a. $240
b. $480
c. $720
d. $960