Hi ysherriff,
ROWS function count no. of rows in the given range.
so your first formula count any value in the range L2:L3238 whose value is less than equal to 59 as Rows($B$5:B5) = 1 * 59 will give 59. (B5:B5 has only 1 row no 5 in the Rows function)
Second formula, will count any value in the same range whose values is less than or equal to 2*59. and than substract sum C5:C5.
Here Rows will give 2 as the range passed to ROWS function has two rows B5:B6, so 5,6 two row.
Note the rows function is using dynamic expanding range, so if you copy the formula down the range will expand automatically to 1,2,3,.... and so on.
Regards,