Refer to the following merchandising transactions for Scout Systems.

Nov. $(1)$Scout Systems purchases merchandise for $$4,400$ on credit with terms of $2/10,$ n$/30.$

$(5)$ Scout Systems pays for the previous purchase.

$(7)$ Scout Systems receives payment for returned defective merchandise of $$500$ that was purchased on November $1.$

$(10)$ Scout Systems pays $$400$ to transport merchandise to its store.

$(13)$ Scout Systems sells merchandise for $$6,500$ on account. The cost of the merchandise was$$4,200.$

$(16)$ A customer returns merchandise from the November $13$ transaction. The returned item sold for $$1,200$ and cost $$780.$ The item will be returned to inventory.

a$.$ Journalize the above transactions for Scout Systems assuming a periodic system. $($If no entry is required for a transaction$/$event$,$ select $"$No journal entry required" in the first account field.$)$

b$.$ Journalize the above transactions for Scout Systems assuming a perpetual system.