Can someone me with number 2 you

Need on this one asap im almost done with this subject

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.