In the following formula, what is the sequence of operations performed:

(X)(Y)/(1+X)

Since X is the only value that changes: Sum all X values Multiply that total by Y Divide that product by (1+X)
	Since X is the only value that changes: Divide each X value by (1+X) Sum them together Multiply that total by Y
	Sum all X values Sum all Y values Multiply them together Divide the result by (1+X)
	For each item: Multiply X times Y Divide that product by (1+X) Add these values together