
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Using the provided bar graph, determine the positive difference between the number of books in the library with the most books and the library with the fewest books.

[asy]
size(250);
defaultpen(fontsize(9));

fill((0,0)--(40,0)--(40,10)--(0,10)--cycle,lightgray);

draw((0,10)--(0,0)--(40,0));

draw((-0.5,2)--(40,2));
draw((-0.5,4)--(40,4));
draw((-0.5,6)--(40,6));
draw((-0.5,8)--(40,8));
draw((-0.5,10)--(40,10));

filldraw((2.5,0)--(2.5,3.5)--(7.5,3.5)--(7.5,0)--cycle,lightred);

draw((10,0)--(10,-0.5));
draw((20,0)--(20,-0.5));
draw((30,0)--(30,-0.5));
draw((40,0)--(40,-0.5));

filldraw((12.5,0)--(12.5,6.2)--(17.5,6.2)--(17.5,0)--cycle,lightred);
filldraw((22.5,0)--(22.5,9)--(27.5,9)--(27.5,0)--cycle,lightred);
filldraw((32.5,0)--(32.5,8.1)--(37.5,8.1)--(37.5,0)--cycle,lightred);

label("0",(-0.5,0),W);
label("500",(-0.5,2),W);
label("1000",(-0.5,4),W);
label("1500",(-0.5,6),W);
label("2000",(-0.5,8),W);
label("2500",(-0.5,10),W);

label("Old Town",(5,-2));
label("Riverview",(15,-2));
label("Downtown",(25,-2));
label("Eastside",(35,-2));

label("Library",(20,-5), fontsize(11));
label(rotate(90)*"Number of Books",(-7,10), fontsize(11));
label("Total Books",(20,12), fontsize(12));

label("750",(5,3.5),S);
label("1240",(15,6.2),S);
label("1800",(25,9),S);
label("1620",(35,8.1),S);

[/asy]

Present the answer in LaTex format: \boxed{Your answer}
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