 
<translate> Na farko sami yawan makonni Casey ya zauna: 3 watanni * 4 makonni / watan = 12 makonni. Sai ka ninka wannan adadin da kuɗin mako-mako don ka san nawa za ta biya a mako: Makonni 12 * $280 / mako = $3360. Sai ka ninka adadin watanni da ta zauna da kuɗin da take biya a kowane wata don ka san nawa take biya a kowane wata: $1000 / watan * watanni 3 = $3000. Sa'an nan ka cire wannan adadi daga jimillar kuɗin da take biya idan tana biya kowane mako don ta sami ajiyarta: $3360 - $3000 = $360. Amsar ƙarshe: 360. <eng> First find the number of weeks Casey stays: 3 months * 4 weeks / month = 12 weeks. Then multiply that number by the weekly rate to find how much she would pay weekly: 12 weeks * $280 / week = $3360. Then multiply the number of months she stays by the monthly rate to find how much she pays monthly: $1000 / month * 3 months = $3000. Then subtract that number from the total amount she pays if she pays weekly to find her savings: $3360 - $3000 = $360. The final answer: 360. 