I haven't seen fast food shops with Market Force that reimburse the entire meal for a family of five. The main fast food restaurant Market Force shops reimburses for two meals, one meal purchased at the drive-thru and the second purchased inside at the counter, but the guidelines require that the shop be completed alone. Another reimburses for one meal: entree, side item, and beverage, and nothing else can be ordered. Others allow you to bring someone with you, but the reimbursement is limited to one meal.
I'm drawing a blank on which fast food client shows "total reimbursement." All the ones I can think of have a maximum reimbursable amount.
The Market Force guidelines are very specific. If you read the guidelines for specific shops, they will tell you exactly what the reimbursement amount is and what the ordering requirements are. They will also state whether you can bring anyone with you or not.