In the worksheet Exam $6$ of the file Questions formulas.xlsx my wife and I are playing a game. We each say a number between $1$ and $12.$ For example, in cell G$11$ I said $4$ and my wife said $2.$ For the cells highlighted in yellow the grand total of the numbers said by me and my wife is$\_\_\_\_\_.$

a$.$

$715$

b$.$

$625$

c$.$

$660$

d$.$

$720$