Answer:
$43.20
Explanation:
He had $294 at first then he spent $24.20 on a plate of pasta, $5.05 on a slushie and gave $59.45 to his sister
so the money left is
294 - 24.20 - 5.05 - 59.45 = 205.3 this is twice of what his sister has so the sister has 102.65
102.65 - 59.45 = 43.20 is the money ahe had at first