X Company, a manufacturer, incurred the following costs in 2020:

Factory supervisor salary	$5,666
Product development costs	5,432
Advertising costs	5,871
Factory equipment rental	4,127
Direct labor	4,594
Direct materials	5,750
Legal department costs	5,851
Factory supplies	4,048
Miscellaneous overhead	4,300
Purchasing department costs	4,497

What were total period costs in 2020?

A: $9,899

B: $11,098

C: $18,141

D: $21,651

E: $28,485

F: $50,136