Hello.

The code I wrote is below. I have two errors, error 409 and 257. It is a utility maximization problem in GAMS, how can I solve it?

```
$title utility maximization
$onText
Maximize F = 10x1 + 25x2 + 14x3 subject to:
5x1 + 2x + 4x3= 300*
7x1 + 3x2 + 3x3= 500*
2x1+6x2+1x3= 200*
$offText
Variables
x1,x2,x3,F;
Positive Variables
x1,x2,x3;
Equations
Fobj,R1,R2,R3;
Fobj…F=E= 10x1 + 25X2 + 14 X3;
R1… 5x1 + 2x2 + 4*x3 =L= 300;
R2… 7x1 + 3x2 + 3*x3 =L= 500;
R3… 2x1 + 6x2+ 1*x3 =L= 200 ;
model
Exercise1 /Fobj,R1,R2,R3/;
solve
Exercise1 USING LP MAXIMIZING F;
```