The figure provided shows the market for calculators. A graph plots demand and supply curves with quantity of calculators along the horizontal axis and price of calculators along the vertical axis. The supply curve has a steep positive slope, and the demand curve has a negative slope. The curves intersect at 300 calculators, 30 dollars. A horizontal line, labeled world price with tariff, starts at 20 dollars on price of calculators and intersects the supply curve at 200 calculators and the demand curve at 500 calculators. A horizontal line, labeled world price, starts at 5 dollars on price of calculators and intersects the supply curve at 50 calculators and the demand curve at 800 calculators. As a result of the $15 tariff, consumer surplus lost is, in numerals, $_____