Answer:
Lunch cost them $ 47.26
Step-by-step explanation:
We have the list of purchases they made as follows;
2 hamburgers = $5.49 + $5.49 = $ 10.98
1 chicken sandwich = $ 6.25
1 order of ribs = $ 12.99
4 soft drinks =$1.75 + $1.75 + $1.75 + $1.75= $ 7
for a total of
$10.98 + $6.25 + $12.99 + $7 = $ 37.22
They paid a 20% tip for the value of the purchase that equals;
$37.22 * 0.20 = $7.44
taxes are also calculated according to the total purchase without including tips, as follows;
$37.22 * 0.7 = $2.60
then lunch cost them;
$37.22 + $7.44 + $2.60 = $ 47.26