Difference between devote and spend

[Mark III]

Test No. incompl/advan-81 "GMAT Verbal Quiz (4)", question 5

The department has ......... so much money on administration that there is little left for employing sales personnel.

(a) devoted
(b) exhausted
(c) developed
(d) spent

Test No. incompl/advan-81 "GMAT Verbal Quiz (4)", answer 5

The department has spent so much money on administration that there is little left for employing sales personnel.

Correct answer: (d) spent

Your answer was: incorrect
The department has devoted so much money on administration that there is little left for employing sales personnel.
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Why is it wrong to use devoted in this case?

[Alan]

Devoted is usually followed by the preposition to.
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