Using the ANOVA with $5\%$ level of significance, determine who among the three salesmen will likely be promoted based on their monthly sales in pesos?

Salesman A has $12,000,10,000\mathrm{.}18,000,16,000,14,400,15,500.$ Salesman B has $15,500,12,500,12,000,13,000,14,000,15,888.$ Salesman C has $12,899,16,000,15,000,12,700,15,000,13,000.$