累算 is read as るいさん (ruisan) and means total.
るいさん
ruisan
るいさんおんど
cumulative temperature
るいさんき
accumulator
るいけい
cumulative total
るいせき
accumulation
るいしん
increasing progressively (of income tax, etc.)
るいぞう
successive or progressive increases
るいせきぶんぷかんすう
cumulative distribution function
るいしんぜいりつ
progressive tax rate
るいかてき
cumulative
るいしんてき
progressive (tax, etc.)
るいしんかぜい
progressive taxation
るいしんぜい
progressive tax