Let the price of electronic products be X and the price of schoolbags be Y.

{4Y-8=X

X+Y=452

{ X = 360°

Y=92

A supermarket: 452 times 0.8=385.6.

B Supermarket: Electronic products return from 360 to 90.

Schoolbag 90 (Volume) +2=2

***362

It is more appropriate to buy it in supermarket B.