NEED HELP. Business Law is frying my brain and my teacher asked to look over this question as well. Please help!

Suppose Sza-Sza manufactures fur coats. On February 1, Rachael advances her $10,000 under a security agreement covering all Sza-Sza's machinery and containing an after-acquired property clause. Rachael files a financing statement that same day. On March 1, Sza-Sza buys a new machine from Elise for $5,000 and gives her a security interest in the machine; Elise files a financing statement within twenty days of the time that the machine is delivered to Sza-Sza.

Who has priority if Sza-Sza defaults on her loan payments?