SELECT sum(revenue) FROM manufacturers WHERE Headquarter  =  'Tokyo' OR Headquarter  =  'Taiwan'
SELECT sum(revenue) FROM manufacturers WHERE Headquarter  =  'Tokyo' OR Headquarter  =  'Taiwan' <table_name> : Manufacturers col : Code | Name | Headquarter | Founder | Revenue row 1 : 1 | Sony | Tokyo | Andy | 120 row 2 : 2 | Creative Labs | Austin | Owen | 100 row 3 : 3 | Hewlett-Packard | Los Angeles | James | 50 row 4 : 4 | Iomega | Beijing | Mary | 200 row 5 : 5 | Fujitsu | Taiwan | John | 130 row 6 : 6 | Winchester | Paris | Robert | 30
col : sum(revenue) row 1 : 250