Mrs. Lopez needs to buy two adult tickets for $11 x 2 = $<<11*2=22>>22.
She needs to buy two senior citizen tickets for $9 x 2 = $<<9*2=18>>18.
She needs to buy three children’s tickets for $8 x 3 = $<<8*3=24>>24.
For everyone’s tickets, Mrs. Lopez needs to spend $22 + $18 + $24 = $<<22+18+24=64>>64 for seven tickets.
#### 64