June sells student desks and is calculating her monthly Cost of Goods Sold expense based on the Moving-Weighted-Average system. On March 1st, she has 17 units- 10 old ones were purchased for $52 while 7 new ones were purchased for $63.

In March, June purchases 12 desks every Sunday (March 5th, 12th, 19th, and 26th). The price changed from $63 to $59 on March 11th, from $59 to $61 on May 16th, and from $61 to $55 on March 23rd.

June's sales were as follows:

March 4th: 9 desks sold for $115 apiece.

March 10th: 6 desks sold for $125 apiece.

March 18th: 13 desks sold for $112 apiece.

March 20th: 5 desks sold for $120 apiece.

March 24th: 8 desks sold for $115 apiece.

March 29th: 15 desks sold for $108 apiece.

Calculate June's COGS for the month. Also, make the necessary journal entries for the March 18th transaction.