Getting 3 stars on Level 1-7

I can find the mouse, but how do I get 3 stars.... I would even be happy with 2 stars!
That darn cat keeps getting in the way. How do I resolve this issue along with looking for the receipts. I find that it is easier if I look for the receipts in the cabinet across from the counter and then the cabinet next to the printer.
Any help would be greatly appreciated!

the main thing in this level is to keep the cat away from the students as they lose stars when the cat stops next to them. Keep on feeding the cat as soon as he starts to wander when you have students sitting at the tables.

Thanks, I'll try that. My next question was going to be if the cat's influence adds or subtract from the total score.

I have tried feeding the cat when he starts wandering when students are present. I even tried feeding him when he was still asleep and I passed his way on my way to wrap presents. But, alas, to no avail. I can't even get ONE star. I must be slow. I have 3 senior citizens and 6 hipsters with no students.

What am I doing wrong? Please, I need all the help I can get.
Is there anyway we can get rid of the cat?

Thanks!

I CAN'T GET PAST LEVEL 1-7 NO MATTER HOW HARD I TRY. WHAT CAN I DO??