Department a had sales of $100,000.00, department b had sales of $500,000.00, and total overhead expenses were $62,000.00. the allocation of overhead to department a should be:

$10,333.33
$1,000,000.000
$5,000,000.000
$1,612.00

$62000 represents the total overhead of the 2 departments so we need the combined sales of $600,000 so we can compare the same types of units.
So department A sold 100,000 out of the 600,000 in sales0r 1/6 of the total sales.

So 1/6 = x/62000. cross multiply to get

6x = 62000 divide by 6 to get
x = 10,333.33

Hope it helps :-)