help with my basic code, I can't figure out the formula that would work to calculate the final cost. the one I'm using makes no sense

18 PRINT "ENTER THE PRICE OF AN ITEH" 20 INPUT U 38 PRINT "ENTER THE DISCOUNT OF THE ITEN" 48 INPUT B 56 PRINT 189(UB)/U;" is the new total cost of the item (after the discount) 68 PRINT "WOULd YOU LIKE TO CALCULATE AGaIN? Y/N 7 (5 INPUT M\$ 86 IF M$="Y" THEN GOT0 15 9 B IF M$ = "N" THEN GOTO 190 1 B PRINT "CONE AGAIN!" 118END