calc_errs_pps
err = calc_errs_pps(&r->total, &p->total, t);
err = calc_errs_pps(rc, pc, t);
err = calc_errs_pps(r, p, t);
err = calc_errs_pps(&rec->total, &prev->total, t);
err = calc_errs_pps(&rec->total, &prev->total, t);
err = calc_errs_pps(r, p, t);
err = calc_errs_pps(&rec->total, &prev->total, t);
err = calc_errs_pps(r, p, t);
err = calc_errs_pps(r, p, t);
err = calc_errs_pps(&rec->total, &prev->total, t);