costs = {
    -- plants
    camomile       = 15,
    cornflower     = 25,
    rose           = 55,
    fertilizer     = 150,
    butterfly      = 150,
    magnet         = 100,
    water          = 50,
    might          = 50,
    
    -- sell
    sell_plant_1_lvl_1 = 15,
    sell_plant_1_lvl_2 = 25,
    sell_plant_1_lvl_3 = 35,
    sell_plant_2_lvl_1 = 25,
    sell_plant_2_lvl_2 = 35,
    sell_plant_2_lvl_3 = 45,
    sell_plant_3_lvl_1 = 55,
    sell_plant_3_lvl_2 = 65,
    sell_plant_3_lvl_3 = 75,
    sell_magnet     = 100,
    sell_fertilizer = 150,
    sell_water      = 50,
    sell_butterfly  = 150,
    sell_might      = 10,
    
    --potions
    potion_harvest = 35,
    potion_water   = 35,
    potion_bugs    = 35,
    
    -- remove weed
    remove_weed    = 25,
    
    -- one unit of water
    water_unit     = 2,
    
    -- object upgrades
    storage_1      = 150,
    storage_2      = 200,
    
    fountain_1     = 100,
    fountain_2     = 150,
    
    garden_statue  = 200,
    
    water_barrel_1 = 80,
    water_barrel_2 = 150,
    
    magic_object_1 = 100,
    magic_object_2 = 250,
};