I need some assistance with taking data from one sheet and moving it to another sheet if it matches up.

Example: (Sheet titled main)
Column A is full of account numbers.
123456
246824
369369
482482
159159
222222
333333
444444

Column B is empty and I want it to populate with the cost amounts from sheet 2 with the same account number.

----
Sheet 2 is titled Jan
Column A has the account numbers again
123456
246824
369369
482482
159159
222222
333333
444444

Column B has the costs
0.25
0.5
0.75
1.25
1.5
1.75
2
2.25


The goal is to have the "main" sheet look over into the "Jan" sheet and for each account number grab the cost next to it and display it on the "main" sheet.
Keep in mind the account numbers aren't in order on both pages like I listed above so it needs a if statement somehow to match the account number then if its found post the amount next to it.

Thank you