Number of items sold by five persons A–E, Monday–Friday. Dashes are missing and to be calculated.
| Day | A | B | C | D | E |
|---|---|---|---|---|---|
| Monday | 840 | 880 | 480 | 560 | — |
| Tuesday | 720 | — | 1040 | 420 | 820 |
| Wednesday | 560 | 480 | 820 | — | 850 |
| Thursday | 1080 | 1020 | — | 1260 | 320 |
| Friday | — | 700 | — | 1020 | 800 |
If the total items sold by A over all five days is 3600, then the difference between the items sold by A on Monday and Friday is:
A640
B450
C420
D440 ✓ Correct
Correct answer: (D) 440
Explanation
The difference is 440, so that is the answer.
A's known days sum to 3200.
With a total of 3600, A on Friday is 400.
A on Monday is 840.
The difference is 840 minus 400.
That equals 440.
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