need help

HI, can anyone please explain to me how to solve the problem below I took it from mock exam: as I could not understand it, the answer is:
2000 unit Product [email protected] for 30 2090
[email protected] 418
Total 2508
your help is appreciated.
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2000 unit Product [email protected] for 30 = £ 2090
[email protected] =£ 418
Total =£2508
your help is appreciated.
30 is 31.35
2000 is y
y=2000x31.35 divided by 30
y=2090
quick reply from all of you. your assistances are highly appreciated.