How competitive is the Clark Scholars Summer Program?

I’m really interested in clark summer program for juniors in economics. I have good grades and test scores (1550) and okay ECs, but nothing exceptional. I have no research experience. Is it even worth applying to? Does anyone have a general idea of the acceptance rate?

From their website I think about 400 to 500 apply but only 12 are selected. Reading other threads, they seem to give preference to those with previous research experience but applying can’t hurt

What does TOTAL SCORE mean on the application? Also, does TEST include SAT subject tests?