just need help finding out the allocated amount

QS 22-1 Allocating costs to departments LO P1

Macee Department Store has three departments, and it conducts advertising campaigns that benefit all departments. Advertising costs are $112,000 this year, and departmental sales for this year follow.

Department	Sales
Department 1	$	300,000
Department 2		480,000
Department 3		220,000

How much advertising cost is allocated to each department if the allocation is based on departmental sales?

Department	Sales	% of Total	Advertising to Allocate	Allocated Amount
1	$300,000	30.00%	$112,000
2	480,000	48.00%	112,000
3	220,000	22.00%	112,000
Total	$1,000,000	100.00%		$0