CREATE TABLE table_31047 ("City/Municipality" TEXT, "Population  ( 2010 ) " FLOAT, "Area  ( km\\u00b2 ) " TEXT, "Pop. density  ( per km\\u00b2 ) " TEXT, "Income Classification" TEXT)

When itogon, benguet is the city/municipality and 1st class is the income classification how many measurements of population in 2010?
SELECT COUNT("Population (2010)") FROM table_31047 WHERE "Income Classification" = '1st Class' AND "City/Municipality" = 'Itogon, Benguet'
SELECT COUNT("Population (2010)") FROM "table_31047" WHERE "City/Municipality" = 'Itogon, Benguet' AND "Income Classification" = '1st Class'