Question 1081911
Sarah has 
{{{ 7*25 + 12*5 = 175 + 60 }}}
{{{ 175 + 60 = 235 }}} cents
----------------------------
You have
{{{ 8*10 = 80 }}} cents
You have 8 more dimes than Sarah, so
{{{ 235 + 80 = 315 }}} cents
You have 315 cents, or $3.15