209
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thirty plus 50 equals 80 it is quite simple. all you do is you just add 3 and 5 then add on the zero.
50 + 40 + 40 + 40 + 30 + 30 + 20 + 10 = 260
100 + 100 + 50 = 250
40% of 50% of 120 = (40/100)*(50/100)*120 = 24.