Here, qwk:
*Pay kieran BTC.1 -- (.1*%transcribed + .025*%proofread) or (.1+0)
*Pay tennis BTC0.055677 -- (.1*%transcribed + .025*%proofread) or ((.1*0.4089219330855018587360594795539)+(.025*0.5910780669144981412639405204461)) or (.0409+.014777)

Pocket mtm's .05. You're only out an extra BTC.005677 this way and it's most fair for work done.