6 per grade, 3 grades in school. Multiply these 2 numbers to find out how many total chalkboards the principal is ordering. 6(3)=18, the principal is ordering 18 new chalkboards.
Since each chalkboard costs $98, multiply 18 by $98 to find the total cost of all the chalkboards. 18(98)=1764. The new boards cost will be $1,764. Final Answer: The total cost of the new chalkboards will be $1,764.