Complex sentence: She later also designed what she named the burqini (or burkini) (a portmanteau of burqa and bikini) for use by Muslim-observant female swimmersm and estimates her sales at more than 700,000 garments since 2008.
Split into simpler sentences: She later also designed what she named the burqini (or burkini) (a portmanteau of burqa and bikini) for use by Muslim-observant female swimmers. She estimates her sales at more than 700,000 garments since 2008.