Francis bought 2 × $2 = $<<2*2=4>>4 worth of muffins.
Francis bought 2 × $3 = $<<2*3=6>>6 worth of fruit cups.
Kiera bought 2 × $2 = $<<2*2=4>>4 worth of muffins.
Kiera bought 1 × $3 = $<<1*3=3>>3 worth of fruit cups.
Their breakfast cost $4 + $6 + $4 + $3 = $<<4+6+4+3=17>>17 in total.
#### 17