1, 9 & 10 (8 sections) This question: 1 posh poke the Which is more economical: purchasing the economy size of a detergent at 7 kilograms for $7.15 or purchasing the regular size at 770 grams los Select the correct choice below and fill in the answer box to complete your choice. (Round to two decimal places as needed.) OA. Purchasing the economy size is more economical because the economy size costs $ less per kilogram OB. Purchasing the regular size is more economical because the regular size costs $ less per kilogram