How to find break even sales? Please show work. Need it to review for a test. Thank you

G lhe following monthly data are available for the W.K. Kent Company: The break-even sales for the month for the company are: Product A Product B Product C Totail Sales $100,000 $80,000 $40,000 $220,000 Variable expenses... 55,000 Contribution margin SS000 siaooo Contribution margin$45,000 $16,000$28,000 89, Fixed expenses.. Net operating income 64,00012,000 131000 76,540 $ 12.460