First calculate the total amount spent:

$\$3.45 + \$6.00 + 2(\$3.25) = \$3.45 + \$6.00 + \$6.50 = \$15.95$

The remaining money is:

$\$25.00 - \$15.95 = \$9.05$

Each stake costs \1.20$. The number of stakes that can be purchased:

$\left\lfloor \frac{9.05}{1.20} \right\rfloor = \lfloor 7.54 \rfloor = 7$

Since you cannot buy a fraction of a stake, the maximum is $7$ stakes.