I'm having trouble figuring out the Ending inventory, Cost of goods sold, Gross profit, & Gross profit rate of "Average Cost"..

Continuing Cookie Chronicle 6 (Part Level Submission) Natalie is busy establishing both divisions of her business (cookie classes and mixer sales) and completing her business degree. Her goals for the next 11 months are to sell one mixer per month and to give two to three classes per week. The cost of the fine European mixers is expected to increase. Natalie has just negotiated new terms with Kzinski that include shipping costs in the negotiated purchase price (mixers will be shipped FOB destination), but the supplier cannot guarantee the invoice price. Natalie has decided to use a periodic inventory system and now must choose a cost flow assumption for her mixer inventory The following transactions occur in February to May 2018 Natalie buys two deluxe mixers on account from Kzinski Supply Co. for $1,150 (S575 each), FOB destination, terms n/30. She sells one deluxe mixer for $1,100 cash. She pays the amount owed to Kzinski. She buys one deluxe mixer on account from Kzinski Supply Co. for $592, FOB destination, terms n/30. Feb. 2 16 25 Mar. 2 30 Natalie sells two deluxe mixers for a total of $2,200 cash. 31 She pays the amount owed to Kzinski. She buys two deluxe mixers on account from Kzinski Supply Co. for $1,172 (S586 each), FOB destination, terms n/30 She sells three deluxe mixers for a total of $3,300 cash. Natalie pays the amount owed to Kzinski. Apr. 1 13 30 May 4 She buys three deluxe mixers on account from Kzinski Supply Co. for $1,800 ($600 each), FO8 destination, terms n/30. 27 She sells one deluxe mixer for $1,100 cash