Martin harvested 60 kilograms of mangoes last February, twice as much in March, and 20 kilograms more in April than the combined harvest in February and March. How many kilograms of mangoes did he harvest in all? (A little side story: My sibling needs help on this and I'm not really confident in word problems. This has been my weakness since I was very young but now I can manage haha btw thanks for the help)