Answer:
January collections:
= 75% * January credit sales
= 75% * 220,000
= $165,000
February collections:
= (75% * February collections) + (25% * January collections)
= (75% * 260,000) + (25% * 220,000)
= $250,000
March collections:
= (75% of March collections) + (25% * February collections)
= (75% * 300,000) + (25% * 260,000)
= $290,000