PC has the 50% off all zen sale stack with 40-50% off coupons from jubile event 2?

Anyone know if the 50% off zen sale on PC will stack with the 40% or even 50% off coupons you can get from the jubilee event?

I just found out the answer the highest coupon you can get is 50% off and the store only uses the highest discount available so if you have a 40% off coupon only the 50% off will be used if you have a 50% off coupon only the 50% off sale will be used and your coupon won't get used.