Two boxes for carrying oranges with a capacity of 80 and 50 were filled with 3/4 and 3/5 of the way full with oranges, respectively. Calculate the total number of oranges the boxes have together.
Stream of thoughts:
90
For the box with a capacity of 80, if it was 3 / 4 full with oranges, it had 3 / 4 * 80 = 60 oranges.

The second box, with a capacity of 50, was 3 / 5 full with oranges, which totals 3 / 5 * 50 = 30 oranges.

Together, the two boxes have 60 + 30 = 90 oranges.

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Final answer: 90